Mark Alan Ruffalo is a renowned American actor, producer, and outspoken activist. He gained international recognition for his role as Bruce Banner / The Hulk in the Marvel Cinematic Universe, starting with "The Avengers" in 2012. Beyond his blockbuster roles, Ruffalo has received critical acclaim and numerous award nominations for his performances in films like "Spotlight," "Foxcatcher," and "Poor Things." He is also a prominent advocate for environmental causes, using his platform to champion social and political change.