Kieran Kyle Culkin (born September 30, 1982) is an American actor. The brother of actors Macaulay and Rory, he began his career as a child actor in the films Home Alone (1990), 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 his first Golden Globe Award, as well as winning a Critics' Choice Movie Award and a Satellite Award. He later appeared in the films Scott Pilgrim vs. the World (2010), Margaret (2011), Wiener-Dog (2016), and No Sudden Move (2021).
Since 2018, Culkin has starred as Roman Roy in the HBO television series Succession, for which he won a Critics' Choice Television Award in 2022 was nominated for a Primetime Emmy Award in 2020 and 2022 and three Golden Globe Awards in 2019, 2020 and 2022.