David Gallagher at an event for Sin City (2005)

David Gallagher at an event for The Day After Tomorrow (2004)

David Gallagher at an event for Windtalkers (2002)

David Gallagher and Adam LaVorgna at an event for Summer Catch (2001)

David Gallagher at an event for Summer Catch (2001)

David Gallagher at an event for Red Planet (2000)

Stephen Collins, Beverley Mitchell, Lorenzo Brino, Nikolas Brino, David Gallagher, Catherine Hicks, and Happy in 7th Heaven (1996)

Michael Campillo and David Gallagher in Secrets of the Bermuda Triangle (1996)

Paul Hipp and David Gallagher in Numb3rs (2005)

David Gallagher, Joseph Morgan, and Paul Wesley in The Vampire Diaries (2009)

David Caruso and David Gallagher in CSI: Miami (2002)

Barry Watson, David Gallagher, and Mackenzie Rosman in 7th Heaven (1996)

David Gallagher and Mackenzie Rosman in 7th Heaven (1996)

Stephen Collins, Beverley Mitchell, Barry Watson, Lorenzo Brino, Myrinda Brino, David Gallagher, Catherine Hicks, and Mackenzie Rosman in 7th Heaven (1996)

Stephen Collins, David Gallagher, and Lauren Storm in 7th Heaven (1996)

Heather Ball and David Gallagher in 7th Heaven (1996)

Lorenzo Brino, Nikolas Brino, David Gallagher, Mackenzie Rosman, and Ashlee Simpson in 7th Heaven (1996)

David Gallagher and Sarah Thompson in 7th Heaven (1996)

Kaley Cuoco, David Gallagher, and Dwight Ketchum in 7th Heaven (1996)

Stephen Collins and David Gallagher in 7th Heaven (1996)

Michael Angarano, David Gallagher, and Evan Rachel Wood in Little Secrets (2001)

Michelle Trachtenberg, Keene Curtis, David Gallagher, Eugene Levy, and Shorty in Richie Rich's Christmas Wish (1998)

Christopher Lloyd, David Gallagher, and Matthew Lawrence in Angels in the Endzone (1997)

Jessica Biel, Stephen Collins, Beverley Mitchell, Barry Watson, David Gallagher, Catherine Hicks, Mackenzie Rosman, and Happy in 7th Heaven (1996)

Jessica Biel, Stephen Collins, Beverley Mitchell, Barry Watson, Lorenzo Brino, Nikolas Brino, David Gallagher, Catherine Hicks, Mackenzie Rosman, and Happy in 7th Heaven (1996)

Jessica Biel, Stephen Collins, Beverley Mitchell, Barry Watson, David Gallagher, Catherine Hicks, and Mackenzie Rosman in 7th Heaven (1996)

Jessica Biel, Stephen Collins, Beverley Mitchell, Barry Watson, Lorenzo Brino, Nikolas Brino, David Gallagher, Catherine Hicks, and Mackenzie Rosman in 7th Heaven (1996)