Gallagher began acting at the age of 2, first modeling for print advertorials in and around New York City which eventually led to commercial work as an actor.
He appeared in many television commercials as a toddler for products such as Tyson Foods and Fisher Price.
In 1996, he reunited with John Travolta for the movie Phenomenon.
Later that year, he was cast as Simon Camden in the family drama series 7th Heaven.
7th Heaven remained on the air for 11 seasons, making it the longest-running family drama in television history, He filmed a few movies during hiatuses from filming, including the direct-to-video Richie Rich's Christmas Wish and Little Secrets with Evan Rachel Wood.
In 2003, during 7th Heaven 's 8th season, David left the show in order to attend college full-time.
He also starred in the horror sequel Boogeyman 2, which went straight to DVD.
In July 2008, Gallagher guest-starred on the TNT drama Saving Grace as Paul Shapiro, a troubled young man who was the suspect in a murder investigation.
I'm a huge fan of anything touched by the Neptunes. I go out with my friends as often as I can on the weekends, and I'm always drawn to girls with rhythm.
David Lee Gallagher (born February 9, 1985) is an American actor.
The same goes on in his personal life as well, and he has had multiple girlfriends till now.