Name	Known for
Burt Young Harry Costas Harry Costas See fewer	Rocky (1976)
Lainie Kazan Helga Costas Helga Costas See fewer	My Big Fat Greek Wedding (2002)
Brad Dourif Mitch Malone Mitch Malone See fewer	The Lord of the Rings: The Two Towers (2002)
Brenda Bakke Rosie Rosie See fewer	L.A. Confidential (1997)
Al Ruscio Detective Hill Detective Hill See fewer	Showgirls (1995)
Timothy Leary Dr. Kyle (as Dr. Timothy Leary) Dr. Kyle (as Dr. Timothy Leary) See fewer	Roadside Prophets (1992)
Alex Winter Timmy Timmy See fewer	Destroy All Neighbors (2024)
Sy Richardson Marv Marv See fewer	Repo Man (1984)
Grand Mixer DXT Roscoe (as DST) Roscoe (as DST) See fewer	Fast Forward (1985)
Frances Bay Gertrude Gertrude See fewer	Blue Velvet (1986)
Larry Storch Willie Willie See fewer	F Troop (1965)
Mel Welles Doctor Doctor See fewer	The Little Shop of Horrors (1960)
George Ortuzar Dr. Kyle's Assistant (as George O) Dr. Kyle's Assistant (as George O) See fewer	Station 4 (2014)
Lou Cutell Sergeant Sergeant See fewer	Honey, I Shrunk the Kids (1989)
Symie Dahut Tart Tart See fewer	Tales from the Crypt (1989)
Nicholas Love Sigfried Sigfried See fewer	Wild at Heart (1990)
The Del Rubio Triplets Del Rubios Del Rubios See fewer	Beyond the Groove (1990)
Richard Green Lou Lou See fewer	Medium Rare (2010)
Joanne Baron Ruth Ruth See fewer	Halloween Ends (2022)