Cast of I'm Dancing as Fast as I Can

Jill Clayburgh plays Barbara Gordon, a documentary film producer battling drug addiction.

Nicol Williamson portrays Derek Bauer, a psychiatrist who assists Barbara Gordon on her journey to recovery.

Dianne Wiest takes on the role of Julie Addison, a supportive friend of Barbara Gordon.

Joe Pesci plays Roger, a character connected to Barbara Gordon's past.

Geraldine Page portrays Jean Scott Martin, a fellow patient in the rehabilitation center where Barbara Gordon seeks treatment.

Albert Salmi plays Ben Martin, another patient at the rehabilitation center.

John Lithgow portrays Mr. Brunner, a key figure in Barbara Gordon's journey towards recovery.

Ellen Greene plays Karen Mulligan, a character involved in Barbara Gordon's support system.

Dan Hedaya takes on the role of Dr. Klein, a medical professional aiding in Barbara Gordon's treatment.

Joseph Maher portrays Dr. Kalman, another medical professional supporting Barbara Gordon.

Richard Masur plays Alan Newman, a character entwined in Barbara Gordon's personal struggles.

Daniel Stern portrays Jim, a character in the film.