DAVID DUCHOVNY

The actor voluntarily entered a facility to treat his sex addiction last week. The 48-year-old has been married to actress Tea Leoni since 1997.

MICHAEL DOUGLAS

The 63-year-old star, now married to actress Catherine Zeta-Jones, once checked into a £500-a-night clinic to be treated for sex addiction.

BILLY BOB THORNTON

The 53-year-old actor and former husband of actress Angelina Jolie is also said to have received treatment for the disorder.