He is a Bristol City fan.
He is not religious, but he has a faith.
Justin is good friends with his The Friday Night Project costar Alan Carr.
As a boy he was very silly in school.
He is always compared to Chuck Norris.
Justin, together with Alan Carr, were named as Cosmopolitan Magazine's Ultimate Celeb Men of 2007.
He lives in Clifton in Bristol and sometimes visits the Water Tower Cafe on the downs.
Justin began hosting a radio show on XFM in 2003 in the 1am-3am Sunday morning slot but now hosts Saturday from 3pm-6pm.
Justin as done quite a lot of voiceover work for TV on adverts for places such as Alton Towers and Thorpe Park.
He is often impersonated by comedian Jon Culshaw.
When he appeared on The Weakest Link he managed to win over ice queen Anne Robinson and the two hugged at the end of the show.
He won the new comedy competition at Edinburgh Festival in 1997.
He is a big fan of rock and roll and is often seen wearing a rock T-Shirt.
Justin's trademark is his distinctive West Country accent.
Before becoming a comic Justin worked as a Double Glazing demonstrator.
He lives in Bristol with his wife Karen and there child Archie.
His wife gave birth to their first child, a boy called Archie, on 16th May 2005.
Justin starred in the TV show Bring Back.
Justin was the narrator for the trailer of the movie Severance.
Justin: My favourite radio programme was a late-night phone-in show hosted by Dave Barrett on GWR. On a Tuesday, he did a thing called Fun on the Phones and I would call in as a character. One night, he did a bit where he posed the question: "If you could go up in a hot-air balloon with a famous person, who would it be?" I called in and spoke in a high-pitched voice saying I wanted to go up with Bob Holness. I was trying desperately to be surreal because as a kid I loved Vic and Bob. The TV was on all the time when I was a kid. I loved The Twilight Zone and Channel 4 showed old episodes at the weekend.
Justin: My two favourite hosts from last series were David Tennant and Noel Edmonds, he was brilliant. Each series we do, the guests seem to be getting bigger and bigger.
Justin: Rock and roll!
Justin: (Referring to the worst part of his job) The uncertainty. In 2004, I did the crossover show for Strictly Come Dancing on BBC3, which changed my life - before that I was completely skint and my wife was paying every single bill.
Justin: I treat each sting like a job interview. You can't fake enthusiasm. I could try to, but you'd see through it. I have so much love for what I'm doing ...
Justin: (Referring to the best part of his job) I love the variety as I get bored really quickly. Over the past three months I've done The Friday Night Project; a show called The Convention Crasher (where I went to Florida to take part in an international convention for celebrity impersonators, as Tom Jones); and I've just come back from Los Angeles, where I reunited the cast of Dallas.
Justin: (When asked what inspired you to embark on a career in the media, he replied with) A simple craving for attention. I'm an only child, so growing up I was king in my house. I suppose I wanted that to continue.
Justin: Bad time. (Another of his many catchphrases)
Justin: Rock on!
Justin: Join a gym, go once, never again and then talk about it all the time. Result.
Justin: Good Times. (One of his many catchphrases)