Robin Williams
as Mork
Pam Dawber
as Mindy Beth McConnell
Conrad Janis
as Fred McConnell
Elizabeth Kerr
as Grandma Cora Hudson
Jay Thomas
as Remo Davinci
Gina Hecht
as Jean Davinci
Tom Poston
as Franklin Bickley
Jim Staahl
as Nelson Flavor
Crissy Wilzak
as Glenda Faye Comstock