Brian Backer (born December 5, 1956) is an American former actor who has starred in film and on television. He is best known for his role in the 1982 hit comedy film Fast Times at Ridgemont High as shy teenager Mark "Rat" Ratner. He appeared in the 1985 comedy film Moving Violations as Scott Greeber and the 1987 comedy film Police Academy 4: Citizens on Patrol as Arnie.
Backer won the 1981 Tony Award for Best Performance by a Featured Actor in a Play, the Drama Desk Award for Outstanding Featured Actor in a Play, and the Theatre World Award for Woody Allen's The Floating Light Bulb, in which he portrayed an Allen-like protagonist.
Backer grew up in Brooklyn.
- The Burning (1981) as Alfred
- Fast Times at Ridgemont High (1982) as Mark "Rat" Ratner
- Talk to Me (1984) as Men's Store Salesman
- Moving Violations (1985) as Scott Greeber
- The Money Pit (1986) as Ethan
- Police Academy 4: Citizens on Patrol (1987) as Arnie
- Perry Mason: The Case of the Lethal Lesson (1989) as Eugene
- Steel and Lace (1991) as Norman
- A Clown in Babylon (1999) as Blake
- Loser (2000) as Doctor
- Marie and Bruce (2004) as Waiter
- Vamps (2012) as Middle-Aged Guy/Dentist
- Robertson, Nan (May 22, 1981). "WINNER OF THE WOODY-ALLEN-KINDRED-SOUL CONTEST". NY Times. Retrieved 7 February 2019.