Frank Conniff Jr. (born August 30, 1956) is an American writer, actor, comedian and producer, best known for his portrayal of TV's Frank on Mystery Science Theater 3000 (MST3K). He is the son of journalist and editor Frank Conniff.
Sabrina, the Teenage Witch
Series • 1996
Mystery Science Theater 3000
Series • 1989
101 Dalmatians: The Series
Series • 1997
Invader ZIM
Series • 2001
God Bless America
Movie • 2012
The Mads are Back
Series • 2020
Make Me Laugh
Mystery Science Theater 3000: The RiffTrax Experiments
Series • 2026
Hidden America with Jonah Ray
Series • 2016
Mystery Science Theater 3000: The Movie
Movie • 1996
RiffTrax Live: MST3K Reunion
Movie • 2016
RiffTrax Live: Summer Shorts Beach Party
Movie • 2017
Cinematic Titanic: The Astral Factor