The star-studded cast of "Avengers: Infinity War" just got bigger as "Game of Thrones" star Peter Dinklage has joined the cast. The role he will be playing has yet to be revealed though.

According to Comic Book, one possible mutant Dinklage will be playing is The Watcher. The Watcher is a mutant who watches over the events around him and could shift the balance of power whenever he feels like it. He usually minds his own business but when he decides to get involved, he could help out The Avengers in "Avengers: Infinity War." Another character Dinklage could play is the Red Hulk, which is a character everyone wants to see appear in the Marvel Cinematic Universe. Dinklage could play someone who gets turned into the Red Hulk, then he can voice the character when it comes to life.

According to Variety, "Game of Thrones" recently finished shooting their seventh season and schedule for shooting has moved from a summer shoot to a fall shoot. This allowed Dinklage to join "Avengers: Infinity War" which is expected to begin shooting in the summer. There is also a planned sequel to the movie and Dinklage will also appear in that one.

"Avengers: Infinity War" stars Chris Evans as Captain America, Robert Downey Jr as Iron Man, Chris Hemsworth as Thor, Mark Ruffalo as The Incredible Hulk, Chris Pratt as Star-Lord, Dave Bautista as Drax, Tom Holland as Spider-Man, Elizabeth Olsen as Scarlet Witch, Benedict Cumberbatch as Dr. Strange, Samuel L. Jackson as Nick Fury, Brie Larson as Captain Marvel, Scarlett Johansson as Black Widow and Josh Brolin as Thanos. The movie is going to be directed by Joe Russo and Anthony Russo. It was written by Christopher Markus and Stephen McFreely.

Check out this teaser about next year's most anticipated movie, Avengers: Infinity War. It is scheduled to open in theatres on May 4, 2018: