Name	Known for
Fred MacMurray Steve Douglas Steve Douglas See fewer	Double Indemnity (1944)
William Demarest Uncle Charley O'Casey Uncle Charley O'Casey See fewer	Mr. Smith Goes to Washington (1939)
Don Grady Robbie Douglas Robbie Douglas See fewer	My Three Sons (1960)
Stanley Livingston Chip Douglas Chip Douglas See fewer	My Three Sons (1960)
Barry Livingston Ernie Thompson Douglas Ernie Thompson Douglas See fewer	Notorious Nick (2021)
Beverly Garland Barbara Harper Douglas Barbara Harper Douglas See fewer	The Alligator People (1959)
Tina Cole Katie Miller Douglas Katie Miller Douglas See fewer	Hawaiian Eye (1959)
Dawn Lyn Dodie Harper Douglas Dodie Harper Douglas See fewer	Walking Tall (1973)
Pitt Herbert Mr. Whiteside Mr. Whiteside See fewer	The Search for the Evil One (1967)
Paul Barselou Mr. Garrison (as Paul Barselow) Mr. Garrison (as Paul Barselow) See fewer	Innerspace (1987)
David Foley Ted Ted See fewer	The Joey Bishop Show (1961)
Andrea Sacino Girl Girl See fewer	Many Happy Returns (1964)
Fred Gerber Bill Bill See fewer	China Beach (1988)