Doomsday' cast in a livestream, with returning actors including Robert Downey Jr., Chris Hemsworth and Anthony Mackie.

Alan Cumming, Channing Tatum and more members of the star-studded "'Avengers: Doomsday" cast reacted to the Wednesday announcement.

Marvel Studios announces that Kelsey Grammer's Dr. Hank McCoy/Beast X-Men character will return in Avengers: Doomsday.