Marisa Tomei (; born December 4, 1964) is an American actress. Following her work on the television series As the World Turns, she came to prominence as a cast member on The Cosby Show spin-off A Different World in 1987.

After having minor roles in a few films, she came to international attention in 1992 with the comedy My Cousin Vinny, for which she received an Academy Award for Best Supporting Actress. Tomei has appeared in a number of successful movies, including What Women Want (2000), Anger Management (2003), Wild Hogs (2007), and Parental Guidance (2012). Other films, include Untamed Heart (1993), Only You (1994), The Paper (1994), Unhook the Stars (1996), Slums of Beverly Hills (1998), Before the Devil Knows You're Dead (2007), Cyrus (2010), Love Is Strange (2014) and The Big Short (2015). She received two additional Academy Award nominations for In the Bedroom (2001) and The Wrestler (2008).

She has also portrayed Aunt May in the Marvel Cinematic Universe, appearing in the films Captain America: Civil War (2016), Spider-Man: Homecoming (2017) and in the upcoming Spider-Man: Far From Home (2019).

Tomei has also worked in theater. She was formerly involved with the Naked Angels Theater Company and appeared in plays, such as Daughters (1986), Wait Until Dark (1998), Top Girls (2008), for which she received a nomination for the Drama Desk Award for Outstanding Featured Actress in a Play, and The Realistic Joneses (2014), for which she received a special award at the Drama Desk Awards.