Kristen Carroll Wiig (/ˈwɪɡ/; born August 22, 1973) is an American actress, comedian, writer, and producer, well known for her work on the NBC sketch comedy series Saturday Night Live (2005–12), and such films as Knocked Up (2007), Walk Hard: The Dewey Cox Story (2007), Paul and Bridesmaids (both 2011), Girl Most Likely (2013), The Secret Life of Walter Mitty (2013), the animated Despicable Me film series, and The Skeleton Twins (2014).

Born in Canandaigua, New York, and brought up in Lancaster, Pennsylvania and Rochester, New York, Wiig attended the University of Arizona, majoring in Art. She later relocated to Los Angeles, where she broke into comedy as a member of the improvisational comedy troupe The Groundlings and made her television debut in 2003. Wiig joined the cast of Saturday Night Live in 2005 and the following year she co-starred in the Christmas comedy film Unaccompanied Minors. After appearing in a series of supporting roles in comedy films such as Knocked Up, Adventureland, Whip It, and Paul, she also starred in and wrote the screenplay for Bridesmaids, which was both critically and commercially successful.