Thumbsucker Cast
The cast of Thumbsucker.
Lou Taylor Pucci
as Justin Cobb

Lou Taylor Pucci plays Justin Cobb, a high school student who struggles with thumb-sucking and seeks to find his identity.

Tilda Swinton
as Audrey Cobb

Tilda Swinton portrays Audrey Cobb, the mother of Justin who reflects on her relationship with her son and her own life challenges.

Vincent D'Onofrio
as Mike Cobb

Vincent D'Onofrio plays Mike Cobb, Justin's father who has difficulty understanding his son's struggles.

Keanu Reeves
as Perry

Keanu Reeves takes on the role of Perry, a motivational speaker who influences Justin in his search for self-discovery.

Benjamin Bratt
as Matt Schramm

Benjamin Bratt plays Matt Schramm, a debate coach who helps guide Justin through competition.

Kelli Garner
as Rebecca

Kelli Garner portrays Rebecca, a girl from Justin's school who becomes an important part of his life.

Chase Offerle
as Joel Cobb

Chase Offerle plays Joel Cobb, Justin's younger brother who observes the family's dynamics.

Vince Vaughn
as Mr. Geary

Vince Vaughn plays Mr. Geary, a teacher who provides guidance to Justin.

Bob Stephenson
as Debate Official

Bob Stephenson appears as the Debate Official, overseeing the debate competition.

Nancy O'Dell
as Self

Nancy O'Dell plays herself, offering a cameo in the film.

Dakota Goldhor
as Girl on Plane

Dakota Goldhor plays the Girl on Plane, who interacts with Justin during his journey.

Eric Normington
as Hotel Desk Clerk

Eric Normington plays the Hotel Desk Clerk, assisting characters at a hotel.

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