Kieran Kyle Culkin (born September 30, 1982) is an American actor. He began his career as a child actor, acting alongside his older brother Macaulay in the Home Alone franchise (1990/1992). His breakout role in Igby Goes Down (2002) received critical acclaim and he was nominated for a Best Actor Golden Globe Award, as well as winning a Critics' Choice Movie Award and Satellite Award. He is also well known for his role as Wallace Wells in the cult film Scott Pilgrim vs. the World.
He has acted on the stage, most notably in several productions of Kenneth Lonergan's play This Is Our Youth. In 2015, he portrayed Rye Gerhardt in season 2 of the FX series Fargo. He portrays Roman Roy in the HBO series Succession, for which his acting led to a nomination for a Golden Globe Award for Best Supporting Actor - Series, Miniseries or Television Film in 2018 and 2019.