The full voice cast list for Marvel's animated Marvel's What If...? series has revealed Clark Gregg's return as Phil Coulson. Debuting in the role at the very start of the Marvel Cinematic Universe by appearing in the original Iron Man in 2008, Gregg has since made sporadic appearances in many other movies. He has also been featured in a main role in the Marvel series Agents of S.H.I.E.L.D.

When the What If...? trailer was released this month, Clark Gregg posted it to his Instagram account. Teasing a return to the role of Phil Coulson, the actor wrote in the caption: "Enter the multiverse of unlimited possibilities. Marvel Studios' first animated series, What If...?, starts streaming August 11th with new episodes Wednesdays on Disney+ -You never know who might show up."

Per the press release, What If...? features more than 50 MCU cast members who reprise their roles. The full list includes, Andy Serkis, Angela Bassett, Benedict Cumberbatch, Benedict Wong, Benicio Del Toro, Bradley Whitford, Carrie Coon, Chadwick Boseman, Chris Hemsworth, Chris Sullivan, Clancy Brown, Clark Gregg, Cobie Smulders, Danai Gurira, and David Dastmalchian. As well as, Djimon Hounsou, Dominic Cooper, Don Cheadle, Emily VanCamp, Evangeline Lilly, Frank Grillo, Georges St-Pierre, Hayley Atwell, Jaimie Alexander, Jeff Goldblum, Jeremy Renner, and John Kani.

The series also brings back Jon Favreau, Josh Brolin, Karen Gillan, Kat Dennings, Kurt Russell, Leslie Bibb, Mark Ruffalo, Michael B. Jordan, Michael Douglas, Michael Rooker, Natalie Portman, Neal McDonough, Ophelia Lovibond, Paul Bettany, Paul Rudd, Rachel House, Rachel McAdams, Samuel L. Jackson, Sean Gunn, Sebastian Stan, Seth Green, Stanley Tucci, Taika Waititi, Tilda Swinton, Toby Jones, Tom Hiddleston, and Tom Vaughan-Lawlor.

While we do get to see the returns of dozens of fan favorite MCU actors, there are some key names missing from the list. Robert Downey Jr. and Chris Evans are both sitting the series out after seemingly retiring from their respective roles as Tony Stark and Steve Rogers. However, the series does feature the real voice of late actor, Chadwick Boseman, who recorded his lines as T'Challa for What If...? prior to his passing last year.

Westworld and The Batman star, Jeffrey Wright, also voices The Watcher, the character that serves as the narrator of the series. Of landing the role, Wright said, "It's obviously pretty cool to be stepping into the MCU now-exciting place. But, of course, The Watcher has always been there really...watching."

"We looked at the big moments of the MCU and thought about ways to twist them-that's where we started," says writer, AC Bradley, of What If...?, which re-imagines how certain events in the MCU might have played out differently. "We came up with 30 log-lines and pitched them to Kevin Feige. He picked 25 of them. That was big, because we knew we were on the right track. But then we had to narrow it down more, and eventually found our season."

Directed by Bryan Andrews with AC Bradley as head writer, What If...? is executive produced by Brad Winderbaum, Kevin Feige, Louis D'Esposito, Victoria Alonso, Bryan Andrews, and AC Bradley. What If...? will debut on August 11th on Disney+.