The Other Sister (1999)

A mentally challenged young woman seeks independence by obtaining her own apartment and attending college while her family plans her sister's wedding.

Director: Garry Marshall

Cast: Juliette Lewis, Diane Keaton, Giovanni Ribisi, Tom Skerritt, Poppy Montgomery, Sarah Paulson, Linda Thorson, Joe Flanigan, Juliet Mills, Tracy Reiner, Hope Alexander-Willis, Harvey Miller, Hector Elizondo, Almayvonne, Marvin Braverman, Laura D'Arista Adam, Linda Hawkins, James Emery