Robin Williams

Henry Altmann

Mila Kunis

Dr. Sharon Gill

Peter Dinklage

Aaron Altmann

Melissa Leo

Bette Altmann

Hamish Linklater

Tommy Altmann

Sutton Foster

Adela (Tommy's Girlfriend)

James Earl Jones

Ruben (Video store owner)

Richard Kind

Bix Field

Daniel Raymont

Ulugbek (Uzbek cab driver)

Chris Gethard

Dr. Jordan Reed (Sharon's friend)

Jerry Adler

Cooper (Aaron's client)

Isiah Whitlock Jr.

Yates (Aaron's client)

Bob Dishy

Frank

Da'Vine Joy Randolph

Nurse Rowan

Jeremie Harris

Leon (Homeless cameraman)

Lee Garlington

Gummy (Homeless studio executive)

Roy Milton Davis

Buster (Homeless man)

Olga Merediz

Jane (Henry's secretary)