Who played the latest actor as Bruce Banner in Hulk?

You're probably thinking of Mark Ruffalo, who played Bruce Banner/Hulk in the Marvel Cinematic Universe (MCU).

He first appeared as Bruce Banner in *The Incredible Hulk* (2008), but Edward Norton played the role in that film. Ruffalo took over the role in *The Avengers* (2012) and has played Banner/Hulk in every MCU film since then.