It apparently takes four to five weeks to treat a sex addiction or so we gather from David Duchovny’s example. The movie star has checked out of the rehabilitation center he entered in late August.

It was scrumptious news back in August when “The X-Files” star David Duchovny entered a rehabilitation center for sex addiction, announcing the world though a statement released to People magazine that he was seeking professional help and that he wished the media and public to respect his privacy and that of his family during this period.

There was much speculation at the time regarding Duchovny’s addiction to sex. The subject had come up before during his career, but he and his wife denied such speculation each time.

He has been married to actress Tea Leoni (“The Naked Truth,” “Bad Boys,” “Spanglish”) since 1997. They are parents to a 9-year-old girl, Madelaine West, and a 6-year-old boy, Kyd.

David Duchovny’s lawyer, Stanton Stein, told People this week that his client had checked out of the rehab facility, after having “successfully completed his treatment,” and that he is ready to start work on a new movie.

Stein did not specify what project Duchovny, 48, was working on.

Duchovny grabbed headlines with his problem since stars rarely confess such an addiction. It’s usually addiction to alcohol or cocaine that they seek help for, frequently after being arrested on suspicion of DUI.

Plenty of examples too. Lindsay Lohan checked into rehab last summer, as she could no longer “manage” her life due to her addiction to alcohol and cocaine, she said at the time. Amy Winehouse has been in and out of rehab for a number of substances she consumes excessively and Aerosmith’s Steven Tyler checked into rehab in May for an unspecified substance-abuse problem.

Other stars check into rehab for anxiety and depression or other emotional problems. Heather Locklear and Kirsten Dunst are two such examples, while Eva Mendes has consistently refused to reveal the reason why she sought help in February of this year.

Duchovny would only say in his statement that he had checked in voluntarily and that he, Leoni and the children were dealing with the situation as a family.

Duchovny became a household name as the star of 1990s cult TV series “The X-Files,” where he portrayed unconventional FBI Special Agent Fox Mulder. He was on the show from 1993, when it first aired on the Fox Network, until 2002, appeared sporadically in the series’ last two seasons and starred in 1998’s “The X-Files,” a feature film based on the TV show, and in this summer’s “The X-Files: I Want to Believe.”

He currently stars in Showtime’s “Californication,” where he portrays Hank Moody, a conflicted novelist living in Los Angeles who is confronted with writers’ block and a troubled personal life. Duchovny received a Golden Globe Award as best comic actor in January for his performance on the series.