Kieran Kyle Culkin (born September 30, 1982) is an American actor. He began his career as a child actor in Father of the Bride (1991), The Mighty (1998), and The Cider House Rules (1999). He achieved a career breakthrough after starring in the film Igby Goes Down (2002), for which he was nominated for a Golden Globe Award, as well as winning a Critics' Choice Movie Award. He appeared in the films Scott Pilgrim vs. the World (2010), Margaret (2011), Wiener-Dog (2016), and No Sudden Move (2021).

From 2018 to 2023, Culkin starred as Roman Roy in the HBO television series Succession, for which he has won a Critics' Choice Television Award and a Screen Actors Guild Award, and has been nominated for three Primetime Emmy Awards and three Golden Globe Awards.

He made his Broadway debut in the 24 Hours Play in 2006. He returned to Broadway in the 2014 revival of Kenneth Lonergan's play This is Our Youth.

Early life
Kieran Kyle Culkin was born on September 30, 1982, in New York City to Christopher Cornelius "Kit" Culkin, a former Broadway stage actor, and Patricia Brentrup, a native of North Dakota who met Kit in 1974 while working as a road traffic controller in Sundance, Wyoming. The couple relocated to Kit's native New York City, and had seven children. Culkin's siblings include: Shane (b. 1976), Dakota (1978–2008), Macaulay (b. 1980), Quinn (b. 1984), Christian (b. 1987), and Rory (b. 1989). He also had a paternal half-sister, Jennifer (born 1970), who died in 2000. Culkin's paternal aunt is actress Bonnie Bedelia.

He spent his early life in the Yorkville neighborhood of Manhattan, where he resided with his parents and siblings. In his early childhood, the family struggled financially; his mother worked as a telephone operator, while his father served as a sacristan at a local Catholic church. In September 1995, Culkin's parents separated, and he has been estranged from his father since.