In 1993, Hamilton appeared with Shannen Doherty on Saturday Night Live, and starred in the film Beethoven's 2nd. In 1997, he briefly starred in the television series Sunset Beach as Cole Deschanel, but was let go only a month after the premiere.
Hamilton was born in Los Angeles, the son of actors George Hamilton and Alana Stewart, and the now ex-stepson of musician Rod Stewart. At 19, Hamilton garnered media attention when he and Shannen Doherty married after knowing one another for only two weeks. The marriage lasted just five months before Doherty filed for divorce. He was then married to Actress Angie Everhart from December 1996 until their divorce in March 1997. Hamilton has been in a relationship with Renee Karalian since 2014. The couple welcomed their first daughter in November 2016.
In addition to his acting career, Hamilton is a singer and Songwriter. In June 2003, Hamilton released a single entitled "Wimmin'" which reached #27 in the UK Singles Chart. The song was co-written by British singer Robbie Williams, who also provided some of the vocals on the track. Hamilton co-wrote Williams' 2003 single "Come Undone". Hamilton also claims that he co-wrote Williams' single "She's Madonna" in 2006, but that Williams omitted his name from publishing.
Since 2007, Hamilton has been performing stand-up comedy at the Hollywood Improv, The Comedy Store, & Room 5 in Los Angeles. In 2013, he appeared as the character Jack Taggert in the Marvel superhero film Iron Man 3. Hamilton also for Iron Man 3 recorded the cover of Sly Fox's Let's Go All the Way along with supergroup The Wondergirls and Robbie Williams.
It was announced on August 17, 2009, he would be competing in season 9 of Dancing with the Stars. He was eliminated first from DWTS on September 23, 2009. Following Dancing with the Stars, Hamilton joined the entertainment news program Extra as a field correspondent.
In 2018, Hamilton directed and starred in the erotic horror film Gothic Harvest.
