Name	Known for
Doug Sheehan Brian Harper Brian Harper See fewer	Knots Landing (1979)
Linda Kelsey Kate Harper Kate Harper See fewer	Lou Grant (1977)
Christopher Daniel Barnes Ross Harper Ross Harper See fewer	The Little Mermaid (1989)
Courtney Thorne-Smith Kristin Carlson Kristin Carlson See fewer	Ally McBeal (1997)
Julia Louis-Dreyfus Eileen Swift Eileen Swift See fewer	Seinfeld (1989)
Pippa Pearthree Martha Martha See fewer	Village of the Damned (1995)
J.J. Johnston Bartender Bartender See fewer	Fatal Attraction (1987)
Vic Polizos Larry O'Donnell Larry O'Donnell See fewer	Superhero Movie (2008)
Meg Gibson Barbara O'Donnell (as Margaret Gibson) Barbara O'Donnell (as Margaret Gibson) See fewer	Invasion (2021)
Christopher Finefrock Justin O'Donnell Justin O'Donnell See fewer	Day by Day (1988)
Thora Birch Molly Farrell (as Thora) Molly Farrell (as Thora) See fewer	Ghost World (2001)
Robert Chavez Sammy Sammy See fewer	Day by Day (1988)
J.P. Dizon Dana Dana See fewer	Day by Day (1988)
Garrett Taylor Blake Blake See fewer	Day by Day (1988)
Erin Leonard-Hood Emily Harper Emily Harper See fewer	Day by Day (1988)
Sara Leonard-Hood Emily Harper Emily Harper See fewer	Day by Day (1988)