Mark Ruffalo is an American actor, activist and filmmaker. A three-time Academy Award nominee, he has appeared in over 50 films in a career spanning over two decades, both as a leading man and a supporting actor. An alumnus of the prestigious Stella Adler Conservatory, Ruffalo started out in theatre, co-founding the Orpheus Theatre Company where he wrote, directed and starred in several plays. Following roles in television shows like CBS Summer Playhouse and Due South, the actor made his feature film debut in the horror film Mirror Mirror 2: Raven Dance (1994). Subsequently, Ruffalo appeared in minor supporting roles in films like The Dentist (1996), The Last Big Thing (1996) and Ride with the Devil (1999), which preceded his breakout role as a troubled youngster in the critically acclaimed drama film You Can Count On Me (2000).

Ruffalo`s performance in the film was well-received in all quarters, and earned him an Independent Spirit Award nomination for Best Male Lead among other accolades. Following You Can Count on Me, Ruffalo began to appear in more prominent supporting roles in films like My Life Without Me (2003), Eternal Sunshine of the Spotless Mind (2004), Collateral (2004) and All the King`s Men (2006); and in leading roles in romantic comedies like View from the Top (2003), 13 Going on 30 (2004) and Just like Heaven (2005).

Standout performances in David Fincher`s mystery thriller Zodiac (2007), Martin Scorsese`s neo-noir psychological thriller Shutter Island (2010) and the comedy-drama The Kids Are All Right revitalised the actor`s career in the late 2000s, with The Kids Are All Right earning Ruffalo his maiden Academy Award nomination and a BAFTA nomination for Best Supporting Actor. In 2012, Ruffalo debuted in the Marvel Cinematic Universe as Dr. Bruce Banner a.k.a Hulk, a role that earned him a global following. He has since reprised the role in Avengers: Age of Ultron (2015), Thor: Ragnarok (2017), Avengers: Infinity War (2018) and Avengers: Endgame (2019). Ruffalo received back to back BAFTA and Oscar nominations in 2014 and 2015, for portraying two characters based on real people.

The first of these was his portrayal of Olympic gold medal-winning wrestler Dave Schultz in the biographical crime drama Foxcatcher, while the second was that of Boston Globe reporter Michael Rezendes in the biographical crime drama Spotlight. Notable directorial credits include the 2010 drama film Sympathy for Delicious. Other significant acting credits include The Brothers Bloom (2009), Margaret (2011), Now You See Me (2013), Begin Again (2013), Infinitely Polar Bear (2014), Now You See Me 2 (2016) and Dark Waters (2019).