(Born Sept. 30, 1982) Kieran Culkin is an American Golden Globe-nominated actor. Kieran Culkin's first film role was a small part alongside his brother, Macaulay Culkin, in Home Alone as cousin Fuller McCallister. As a teenager, he alternated between lead roles in independent films and small parts in mainstream films. His most notable role to date is probably the title character in the well received film Igby Goes Down.