10 Marvel Actors Who Leaked Huge MCU Spoilers

:0:1

As the Marvel Cinematic Universe has grown to be one of the biggest franchises of all time, there have been occasions when its actors have leaked spoilers about upcoming projects. Across the MCU’s movie timeline, the franchise has grown in both scale and scope, with its branching narrative having earned it the status as one of the most popular modern franchises. As such, those who follow the MCU often find themselves hugely anticipating upcoming plot points, character introductions, or other exciting moments.
Though the actors to appear in the movies and TV shows of the MCU are typically sworn to secrecy about upcoming projects, this doesn’t always go to plan. On occasion, Marvel actors have found themselves in situations where they have inadvertently let details slip, spoiling future twists or developments in the process. Though Marvel reportedly frown on any such conduct, it has sometimes proved unavoidable, as even the most beloved Marvel actors have mistakenly revealed information ahead of time.
10 Gwyneth Paltrow Dropped A Huge Spoiler About Pepper Potts And Tony Stark Paltrow Revealed The Existence Of Morgan Stark Close Having appeared in the first ever movie in the MCU, Gwyneth Paltrow is one of the franchise’s longest-serving actors. However, that experience didn’t prevent her from leaking a significant plot point ahead of the release of the hugely anticipated Avengers: Endgame. In an interview with the official Avengers: Infinity War magazine, Paltrow said: “Pepper and Tony have had a real long journey together. She obviously starts as his dutiful assistant, and then the relationship evolves, and now this decade later they"re married, and they have a child.”
The quote explicitly reveals the existence of Morgan Stark, who had not been announced ahead of Endgame’s release. By confirming that Pepper and Tony had a child, Paltrow also subtly confirmed a time jump between the events of Infinity War and Endgame. As such, Paltrow inadvertently leaked multiple details about Avengers: Endgame in a single interview.
(Source: ComicBook.com)
9 Frank Grillo Spoiled His Time Heist Return Grillo Announced His Reappearance Despite Crossbones' Death Close Per ComicBook.com, actor Frank Grillo admits that he also faced backlash from Marvel after revealing multiple details ahead of time. In an interview discussing being cast in the DCU, Grillo spoke about the pressures of avoiding spoilers leading up to a major release. He referenced his difficulty in keeping secrets about his upcoming MCU performances during his time in the franchise, explaining that Marvel were displeased with his repeated spoilers.
Grillo announced his return in Captain America: Civil War ahead of any official announcements. Likewise, he did the same ahead of his role in Avengers: Endgame’s time heist, as he hyped his reappearance even though his character had already died in the franchise’s canon. As such, Grillo revealed enough information for some to figure out the time travel aspect of Endgame before the film’s release, spoiling a key MCU plot point.
8 Quicksilver's Voice Actor Revealed Evan Peters' Return Quicksilver's Spanish Voice Actor Was Dropped For Spoiling A Huge Twist Close Another Marvel actor who leaked a major spoiler wasn’t one of the franchise’s live-action performers, but rather one of its Spanish voice actors. Rodri Martin served as the actor to perform the Spanish voice of Evan Peters’ Quicksilver in Fox’s X-Men movie franchise, but was fired from the role after spoiling his casting in the MCU. Martin announced his return to the role – and therefore, Peters’ return, too - ahead of the actor’s appearance in WandaVision.
Evan Peters’ return as Quicksilver in WandaVision was a major twist, as the MCU’s previous iteration of the character was portrayed by Aaron Taylor-Johnson. Peters’ appearance was another mind-bending aspect of WandaVision’s story, only later being made clear by further revelations. However, Martin’s hasty announcement of his return included the announcement of Peters’ own, leaking a huge MCU plot point ahead of time.
(Source: TheDirect.com)
7 Dave Bautista Announced A Spoiler Before Anyone Could Stop Him Bautista Confirmed Drax's Survival Incredibly Early On Close One of the most significant moments in MCU history came at the end of Avengers: Infinity War, when Thanos was able to amass the Infinity Stones and execute his plan of eradicating half of all life in the universe. This saw half of the MCU’s characters turn to dust, leading to a huge cliffhanger that set up the enticing culmination of the Infinity Saga, Avengers: Endgame. However, some Marvel actors, such as Dave Bautista, hastily announced their return to the franchise, confirming that their characters would somehow survive their apparent demise.
In an interview with Collider after the release of Infinity War, Bautista confirmed that he had already filmed his scenes for Avengers: Endgame. He went on to announce that he had also signed on as part of Guardians of the Galaxy Vol. 3’s cast, confirming that his character had not only survived Infinity War, but that he would also survive the events of the then-unreleased Endgame. Though Bautista wasn’t the only actor to do so, his hasty announcement spoiled one of the MCU’s biggest narrative developments.
6 Evangeline Lilly Leaked The Return Of Ant-Man's Villain Context Clues Spoiled One Of Quantumania's Major Twists Close Sometimes, Marvel actors indirectly leak big spoilers in the subtlest of ways. Due to the popularity of the MCU, actors’ interviews and social media posts are often carefully examined for clues as to what may be to come in upcoming MCU projects, and Hope Van Dyne actor Evangeline Lilly was caught out in just such a manner. During the production of Ant-Man and the Wasp: Quantumania, Lilly posted a picture online of the front page of her script, tagging her co-stars.
Lilly had tagged Corey Stoll, whose character, Darren Cross, had seemingly died after his Yellowjacket suit malfunctioned in Ant-Man. Her premature hint at his return, combined with Marvel teasing the MCU giving the villain MODOK a new origin story and identity, led many fans to correctly surmise that Stoll would be assuming the role. What would have otherwise been an unexpected twist was ultimately spoiled by an innocent social media post from an excited Marvel actor.
5 Alfred Molina Announced His Return Well In Advance Molina Was Too Excited About Doc Ock To Keep It Secret Close The cast of Spider-Man: No Way Home featured a number of familiar faces from the hero’s cinematic history, cracking open Marvel’s multiverse in a massive way. While many actors’ returns were kept quiet leading up to the film’s release, one of its villains was revealed months earlier. Alfred Molina, who played Otto Octavius – A.K.A. Doc Ock – in 2004’s Spider-Man 2, announced his return nine months before No Way Home’s release.
Speaking with Variety at the time, Molina confirmed that he would be reprising the role in the MCU movie. As Molina leaked the information so far in advance, Marvel Studios went on to use him in promotional materials for the film. However, it’s unlikely that he was originally intended to announce his casting, as many of the movie’s other multiversal inclusions were kept secret leading up to its release.
4 Samuel L Jackson's Spoiler Was Hugely Disappointing Jackson Hinted At An Exciting Story That Proved Underwhelming Close Samuel L. Jackson not only plays one of the most important characters in the MCU, but is also one of the franchise’s most celebrated actors. However, this hasn’t rendered him entirely immune from leaking information, as he has also fallen victim to fans’ overwhelming anticipation of upcoming releases. Leading up to the release of Captain Marvel, Jackson announced that the film would explain the origin of how Nick Fury lost his eye. Naturally, many were excited about the development.
Unfortunately, the ultimate reveal was incredibly underwhelming, and Jackson offering up the tease ahead of time was met with backlash. What’s more, earlier in his MCU career, someone in Marvel’s production office made a copy of Jackson’s script of The Avengers and posted it for sale online. Though the latter certainly wasn’t Jackson’s fault, it outlines the ways in which an actor can be used to either let details slip, or have them leaked ahead of time.
(Sources: Entertainment Weekly, Entertainment Tonight)
3 Chris Evans' Emotional Goodbye Prematurely Confirmed His MCU Exit Evans Spoiled Cap's Retirement Ahead Of Time Close Though Chris Evans typically has a reasonably good track record for keeping MCU secrets, he still slipped up once or twice over the course of the Infinity Saga. Perhaps the biggest example of this came about as the result of Marvel’s own secret-keeping tactics. After reading his script for Avengers: Endgame, Evans accidentally revealed Sam Wilson as the new Captain America to actor Anthony Mackie, who had not been made aware in his own script.
What’s more, Evans also heavily hinted at such an outcome on social media ahead of the film’s release. The actor posted an emotional farewell to the character of Steve Rogers before Endgame hit theaters, prompting speculation about the potential death or retirement of the MCU’s Captain America. Ultimately, it proved to be true, and though Evans didn’t explicitly spoil his ending, he certainly teased it prematurely.
2 Tom Holland's History Of Dropping Spoilers Is Well-Known Holland's MCU Spoiler Record Is Not Good Close At one time, Tom Holland was one of the MCU’s biggest liabilities in terms of keeping upcoming narrative developments quiet. The actor earned himself a reputation for being unable to keep secrets, repeatedly letting details slip in interviews, much to the dismay of Kevin Feige and Marvel Studios. However, it’s fair to note that Holland redeemed himself somewhat ahead of Spider-Man: No Way Home, as he successfully kept the appearances of Tobey Maguire and Andrew Garfield secret.
Perhaps the most infamous example of Holland serving up MCU spoilers came on opening night of Avengers: Infinity War. Mistakenly believing that his appearance in front of the audience was after the screening, Holland announced “I’m alive!”, tipping them off to his death in the movie’s ending. Many of Holland’s other MCU leaks have been relatively minor, but he still earned himself a reputation as a terrible secret-keeper.
1 Mark Ruffalo Is The MCU's Worst Secret-Keeper Ruffalo Has Let Many Spoilers Slip Close Over the years, Mark Ruffalo has proved himself to be by far the worst at keeping MCU secrets. Not only has he slipped up as regularly as Tom Holland, but he has let significant details leak to the public ahead of time on multiple occasions. Most notable is the time that Ruffalo accidentally forgot to end a live stream ahead of Thor: Ragnarok’s premiere, sharing the audio of the film’s opening 10 minutes with his audience.
Ruffalo gleefully also announced in an interview that “everybody dies” in Avengers: Infinity War ahead of its release, spoiling one of the biggest MCU twists of all time. The Hulk actor additionally spoiled Steve Rogers’ MCU ending, having thought it to be from a fake script given to him specifically to prevent spoilers. As a result, Mark Ruffalo has earned himself the status of the actor most likely to leak details ahead of a Marvel Cinematic Universe release.

Marvel Cinematic Universe The Marvel Cinematic Universe is a multimedia superhero franchise that began in 2008 with Paramount's Iron Man starring Robert Downey Jr. The franchise quickly grew in popularity, with Disney eventually buying out Marvel Entertainment in 2009. The MCU consists of dozens of movies and TV shows, most notably Avengers: Endgame, WandaVision, and Loki.
Created by Kevin Feige First Film Iron Man Upcoming Films Deadpool & Wolverine , Captain America: Brave New World , Thunderbolts* (2025) , Blade (2025) , The Fantastic Four: First Steps (2025) , Avengers: Doomsday (2026) , Avengers: Secret Wars First TV Show Agents of S.H.I.E.L.D. Upcoming TV Shows Agatha: Coven of Chaos , Ironheart , Daredevil: Born Again , Wakanda , Your Friendly Neighborhood Spider-Man , Marvel Zombies , Wonder Man , Vision Quest Cast Robert Downey Jr. , Chris Evans , Scarlett Johansson , Samuel L. Jackson , Jeremy Renner , Chris Hemsworth , Mark Ruffalo , Edward Norton , Paul Rudd , Tom Holland , Tom Hiddleston , Anthony Mackie , Cobie Smulders , Brie Larson , Chadwick Boseman , Sebastian Stan , Chris Pratt , Dave Bautista , Zoe Saldana , Bradley Cooper , Vin Diesel , Pom Klementieff , Josh Brolin , Karen Gillan , Clark Gregg , Paul Bettany , Don Cheadle , Benedict Cumberbatch , Evangeline Lilly , Simu Liu , Aaron Taylor-Johnson , Angelina Jolie , Kit Harington , Salma Hayek , Richard Madden , Barry Keoghan , Gemma Chan , Ma Dong-seok , Brian Tyree Henry , Kumail Nanjiani , Lauren Ridloff , Lia McHugh , Jonathan Majors TV Show(s) Agents of S.H.I.E.L.D. , Agent Carter , Inhumans , WandaVision , The Falcon and the Winter Soldier , Loki , What If...? , Hawkeye , Moon Knight , Ms. Marvel , She-Hulk: Attorney at Law , Secret Invasion , Marvel's Echo Expand Upcoming MCU Movies