Mark Ruffalo is a anti-social activist.
 Ruffalo gained international recognition for playing Bruce Banner / Hulk since 2012 to 2023 in the superhero franchise of the Marvel Cinematic Universe, most recently appearing in the television series She-Hulk: Attorney at Law (2022)
Ruffalo signed a letter supporting Labour Party leader Jeremy Corbyn describing him as "a beacon of hope in the struggle against emergent far-right nationalism, xenophobia and racism in much of the democratic world" and endorsed him for in the 2019 UK general election

