James Gunn’s ‘The Suicide Squad’ Has Recruited Sylvester Stallone, But Who Is He Playing?

The Suicide Squadcompleted production back in February, and now directorJames Gunnis hard at work on post-production to finish the film for release in August 2021. But that hasn’t stopped the movie from picking up a new cast member.Sylvester Stallonehas officially joined the cast ofThe Suicide Squad, and there’s a chance we know who he’s playing.

Director James Gunn confirmed the Sylvester Stallone’s involvement on social media by posting thison Instagram:

Sylvester Stallone Joining The Suicide Squad

In the caption accompanying the photo, Gunn wrote, “Always love working with my friend Sylvester Stallone and our work today on #TheSuicideSquad was no exception. Despite Sly being an iconic movie star, most people still don’t have any idea what an amazing actor this guy is.” Just to ensure there wasn’t any confusion, a fan double-checked to verify this meant Stallone was going to be in the movie, and the director double-confirmed the Rocky and Rambo star’s involvement.

In case that wasn’t enough, Stallone also posted a story to Instagram confirming his involvement:

BREAKING: Sylvester Stallone says he’s going to be in James Gunn’s The Suicide Squad.(Source: Sly’s Official Instagram)pic.twitter.com/Gz7T6XQP5P

— Price of Reason (@priceoreason)June 25, 2025

If production onThe Suicide Squadhas been done since February, then what role is Sylvester Stallone playing? Could Gunn be doing reshoots and adding Stallone as a new character? Probably not. You’ll notice that both Stallone and Gunn don’t say anything about shooting scenes. Stallone says he’s doing “a little work” and Gunn refers to their collaboration as “our work today.” So if Stallone isn’t shooting any scenes for the movie, then what work is he doing?

You might remember thatThe Suicide Squadis bringing King Shark to the big screen. During production, comedianSteve Ageewas the physical stand-in to represent the character on set, in addition to playing the characterJohn Economos, a role he willreprise in the HBO Max spin-off seriesPeacemakerstarring John Cena. But there hasn’t been an actor announced for King Shark’s voice yet. Some speculated that might be whoTaika Waititiis playing, but when you look at King Shark above, doesn’t Sylvester Stallone’s voice feel kinda perfect for that character?

Another option is that James Gunn could be shooting a credits scene or two forThe Suicide Squad, perhaps leading into something for either a presumed sequel or the Peacemaker series. After all, Gunn not only gave Stallone a cameo role inGuardians of the Galaxy Vol. 2, but he put him in a credits scene teasing a new assembly of Guardians.

No matter what Stallone is doing in The Suicide Squad, his involvement is an exciting addition to an already stacked cast. The rest of the movie featuresMargot Robbieas Dr. Harleen Quinzel / Harley Quinn;Idris Elbaas Robert DuBois / Bloodsport;John Cenaas Christopher Smith / Peacemaker;Joel Kinnamanas Rick Flag;Peter Capaldias Clifford DeVoe / The Thinker;Jai Courtneyas George “Digger” Harkness / Captain Boomerang;Pete Davidsonas Richard Hertz / Blackguard;David Dastmalchianas Abner Krill / Polka-Dot Man;Michael Rookeras Brian Durlin / Savant;Nathan Fillionas Floyd Belkin / T.D.K.;Daniela Melchioras Ratcatcher 2;Steve Ageeas Nanaue / King Shark; and, of course,Sean Gunnas John Monroe / Weasel.

The Suicide Squadwill arrive in theaters onAugust 6, 2021.