He studied at the Drama Centre London, where he was expelled during his final year. He made his presenting debut as a video journalist for MTV.
He attended sex, heroin, and alcohol addiction meetings and used Kundalini Yoga to help recover.
He got married to singer Katy Perry in 2010, but their marriage only lasted 14 months. In 2016, he began dating Laura Gallacher; they had a daughter named Mabel in November 2016. They married less than a year later in August 2017. They had a second daughter, Peggy, in 2018.
He starred with Jonah Hill in the comedy Get Him to the Greek.