Avengers: Doomsday's Robert Downey Jr. shares a behind-the-scenes set photo that shouts out Hawkeye actor Jeremy Renner.

Spot these 10 celebrity cameos that you might have forgotten— from David Bowie in 'Zoolander' to Daniel Radcliffe in ...

Chris Hemsworth channeled his inner god of thunder, ditching his shirt to deliver a knockout performance on a punching bag.

The former 'Iron Man' star has teased his debut as Doctor Doom in next year's MCU sequel, 'Avengers: Doomsday.' ...