Robert Redford played the character Alexander Pierce in the Marvel Cinematic Universe (MCU), including in Avengers: Endgame. Alexander Pierce is a high- ranking government official and former Secretary of S.H.I.E.L.D. who is secretly a double agent working for the villainous organization Hydra. Redford originally portrayed Pierce in Captain America: The Winter Soldier, where his character was revealed as a mastermind villain infiltrating S.H.I.E.L.D. Pierce attempts to use advanced technology for a covert Hydra agenda, making him a key antagonist in the MCU. In Avengers: Endgame, Redford reprised his role in a brief cameo during a time travel sequence, showing Pierce as he existed around the 2012 Battle of New York. This cameo was Robert Redford's final onscreen appearance before retirement. In summary, Robert Redford's role in Avengers was as Alexander Pierce, a villainous figure embedded within S.H.I.E.L.D., initially introduced in Captain America: The Winter Soldier and returning for a cameo in Endgame.