Avengers: Endgame co-director Joe Russo revealed that his daughter would have a secret role in the upcoming film while on the red carpet for Captain Marvel.
"This is my daughter, Ava, who's actually playing a secret role in Avengers: Endgame," Joe said, according to ComicBook.com. "We're not talking about what it is yet. That's it and that's all you're going to know."
Little is known about that cameo at this time, though some fan theories have Ava playing Lila Barton, daughter of Clint Barton/Hawkeye. However, it's entirely possible the director's daughter will just have a background cameo at some point in the film.
Joe Russo himself has made several cameos in Marvel Cinematic Universe films. He appeared in Captain America: The Winter Soldier as a character named Dr. Fine, one of the doctors who operated on Nick Fury after he was shot. He also cameoed in Captain America: Civil War, playing Theo Broussard, the psychiatrist that Helmut Zemo eliminates and impersonates to get access to Bucky. He also had a cameo in Avengers: Infinity War that didn't make the final cut of the movie. In that cameo, he played Burt, a paparazzo trying to snap a photo of Tony Stark and Pepper as they walked in the park.
It's not uncommon for directors to have their children appear in their films. Robert Downey Jr.'s first role was playing a puppy in the 1970 film Pound, which was directed by his father, Robert Downey.
Directed by Anthony and Joe Russo, Avengers: Endgame stars Robert Downey Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson, Jeremy Renner, Don Cheadle, Paul Rudd, Brie Larson, Karen Gillan, Danai Gurira, Benedict Wong, Jon Favreau and Bradley Cooper, with Gwyneth Paltrow and Josh Brolin. The film arrives April 26.