Meet IGBY SLOCUMB (Kieran Culkin), an iconoclastic young teenager and hapless product of a deplorable upbringing. Igby is the youngest member of the Slocumb family which, in reality, is four individuals reluctantly sharing familial blood ties, existing under one roof. The father, JASON SLOCUMB (Bill Pullman), is in the midst of a sojourn not just from work but from life in general. Igby's mother, MIMI SLOCUMB (Susan Sarandon), is a battle-hardened, icy-cold matriarch with a long-term dependency on friendly sedatives-her "little peppies." Igby's older brother, OLIVER SLOCUMB (Ryan Phillippe), has set his cruise control for Columbia University and is eager to embrace young Republicanism. Oliver personifies everything that Igby is not; and, though the two brothers are separated by three years, Igby has struggled since day one to emerge from Oliver's persistent shadow.