The Grey's Anatomy star has a twin brother named Jason. Back in the day, the two brothers were given the nicknames "Juddybird" and "Jaybird". He's been married since 1993, his wife's name is Keisha and she used to work as a model agency booker. The couple have five children - four daughters, two are twin sisters, and one son.

And Justin is not the only one in the family who's working in the spotlight. His eldest daughter is also pursuing a stage career - she is the bass player for the rock band 'Pinky Pinky'. They released their first album Turkey Dinner in 2019.

Justin Chambers suffered from a sleep deprivation disorder

Before he was cast in Grey's Anatomy, Justin mainly worked as a model. Today, he looks back at his early days in show business with a twinkle in his eye: "I don't look like a model in real life. I'd go in for shoots and they thought I was the delivery boy — (but) I pulled it off for a while," he joked in an interview with the East Bay Times in 2006.

Grey's Anatomy: Cast members Justin Chambers, Katherine Heigl and T.R. Knight in 2005.

In 2008, Justin actually sought help in a clinic for a sleep deprivation disorder. "It's an issue I've had for a while," he told People in 2008. "Your mind keeps racing and your body is tired. It wants to go to sleep, but it can't. I got to my wit's end"