Mark Alan Ruffalo (born November 22, 1967) is an American actor and producer. He began acting in the early 1990s and first gained recognition for his work in Kenneth Lonergan's play "This Is Our Youth" (1998) and drama film "You Can Count On Me" (2000).

Ruffalo gained international recognition for playing Bruce Banner / Hulk in the Marvel Cinematic Universe superhero films "The Avengers" (2012), "Iron Man 3" (2013), "Avengers: Age of Ultron" (2015), "Thor: Ragnarok" (2017), "Avengers: Infinity War" (2018), "Captain Marvel" (2019), "Avengers: Endgame" (2019), and "Shang-Chi and the Legend of the Ten Rings" (2021), as well as the upcoming Disney+ series "She-Hulk" (2022).

In 2019, Ruffalo starred in and co-produced "Dark Waters". He plays the part of Robert Bilott a corporate defense lawyer from Cincinnati, Ohio, working for law firm Taft Stettinius & Hollister. Farmer Wilbur Tennant, who knows Robert's grandmother, asks Robert to investigate a number of unexplained animal deaths in Parkersburg, West Virginia. Tennant connects the deaths to the chemical manufacturing corporation DuPont, and gives Robert a large case of videotapes.

The film is based on the 2016 "New York Times Magazine" article "The Lawyer Who Became DuPont's Worst Nightmare" by Nathaniel Rich.

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