In 2005–06, Gigandet was cast asKevin Volchok on theFox teen drama television seriesThe O.C., appearing in 15 episodes. Gigandet portrayed the role of Kevin, a bad boy and rebellious competitive surfer who develops a casual relationship with rich socialiteMarissa Cooper (Mischa Barton).[8]In August 2007, Gigandet was cast in theSummit Entertainment/Mandalay Pictures action drama filmNever Back Down. He portrayed the role of villainous bad boy and fighting champion Ryan McCarthy, who sets out to take down the film's protagonist.[9] Gigandet and co-starSean Faris shared an award for "Best Fight" at the2008 MTV Movie Awards.[10]In December 2007, Summit Entertainment cast Gigandet in the planned film adaptation of the best-sellingvampire book seriesTwilight byStephenie Meyer. He signed on to portray the role of the "tracker" vampireJames. Gigandet received his second "Best Fight" award win at the2009 MTV Movie Awards withRobert Pattinson.[10]
In 2008, Gigandet won the award for "One to Watch" at the 10th AnnualYoung Hollywood Awards. In August 2008, Gigandet signed on to theScreen Gems supernatural horror filmThe Unborn, portraying the role of the protagonist's love interest.[11] Also in 2009, Gigandet starred as Corporal Gallo in the sci-fi thrillerPandorum.[12] In 2009, Gigandet was cast alongsideLeighton Meester andMinka Kelly in the thriller filmThe Roommate.[13]
Gigandet married Dominique Geisendorff in 2008. They have two daughters, Everleigh and Armie, and a son named Rekker.[16][17][18][19][20] Geisendorff filed for divorce in August 2022.[21]
On October 16, 2024, Gigandet welcomed his fourth child, a boy named Dare Wylder James Gigandet, with actressHannah James.