Daryl Hannah, Peter Gallagher, and Valérie Quennessen in Summer Lovers (1982)

Jane Fonda and Peter Gallagher in Grace and Frankie (2015)

Paul Sorvino and Peter Gallagher in Perfume (2001)

Peter Gallagher in The O.C.: Obsess Completely (2004)

Peter Gallagher and Maureen McCormick in The Idolmaker (1980)

Laura San Giacomo and Peter Gallagher in Sex, Lies, and Videotape (1989)

Peter Gallagher in Sex, Lies, and Videotape (1989)

Beverly D'Angelo, Steve Guttenberg, Peter Gallagher, and Connie Booth in High Spirits (1988)

Jennifer Tilly and Peter Gallagher in High Spirits (1988)

Peter Gallagher and Mariska Hargitay in Law & Order: Special Victims Unit (1999)

Peter Gallagher, Mariska Hargitay, and Kirk Acevedo in Law & Order: Special Victims Unit (1999)

Peter Gallagher in Law & Order: Special Victims Unit (1999)

Peter Gallagher, Christopher McDonald, and Mariska Hargitay in Law & Order: Special Victims Unit (1999)

Jane Fonda, Peter Gallagher, and Lily Tomlin in Grace and Frankie (2015)

Peter Gallagher and Jacqueline Obradors in Palm Springs (2020)

Peter Gallagher in Peter Gallagher/J.R. Ramirez/Taye Diggs/Rumer Willis (2020)

Peter Gallagher, Tate Donovan, Mischa Barton, Adam Brody, Melinda Clarke, Alan Dale, Kelly Rowan, Ben McKenzie, and Rachel Bilson in The O.C. (2003)

Jennifer Lopez, James Earl Jones, Mary Stuart Masterson, Peter Gallagher, Erika Alexander, Jordan Charney, Peter Michael Goetz, Page Hannah, Traci Lind, Anne Meara, George Newbern, Geraldine Page, and Pamela Payton-Wright in My Little Girl (1986)

Peter Gallagher, Mischa Barton, Adam Brody, Melinda Clarke, Kelly Rowan, Ben McKenzie, and Rachel Bilson in The O.C. (2003)

Peter Gallagher, Adam Brody, Melinda Clarke, Kelly Rowan, Autumn Reeser, Ben McKenzie, Rachel Bilson, and Willa Holland in The O.C. (2003)

Peter Gallagher, Tate Donovan, Mischa Barton, Adam Brody, Melinda Clarke, Kelly Rowan, Ben McKenzie, Chris Carmack, and Rachel Bilson in The O.C. (2003)