"I have voluntarily entered a facility for the treatment of sex addiction," the actor tells the celebrity magazine. "I ask for respect and privacy for my wife and children as we deal with this situation as a family."
Duchovny, 48, is married to actress Tea Leoni. They live in Malibu, Calif., with their two children, daughter Madelaine, 9, and son Kyd, 6.
On Showtime's "Californication," Duchovny plays the troubled Hank Moody, a role for which he won a Golden Globe.