Portia de Rossi, wife of Ellen DeGeneres, has secretly checked into rehab for a one-month stay during May, according to reports.

The 41-year-old Arrested Development star spent 30 days at the Passages Malibu rehab facility, InTouch reports.

According to sources, DeGeneres visited her spouse every weekend to provide support.

APP

An admission counsellor at the facility said the “primary issue has to be a substance abuse issue, because that’s what we’re licensed as.”

De Rossi has not spoken of why she attend rehab.

AAP

Dead Poet Society star, Robin Williams also checked into rehab. He is receiving treatment at Hazelden Addiction Treatment centre in Lindstrom, Minnesota.

“The Lodge Program participants who have years of recovery come to tune up spirituality, do inventory step work, focus on issues of sponsorship, and recommit to their program of action,” the Hazelden’s website says.

William’s rep has said that the star is not there because of addiction; rather he is taking the opportunity to “fine tune and focus on his continued commitment”, according to reports in TMZ.

In 2006, after 20 years of sobriety, Williams entered rehab for alcoholism.

During his rise to fame in the late 1970s, Williams became addicted to alcohol and cocaine, he told People in 1988.

“Cocaine for me,” Williams said at the time, “was a place to hide. Most people get hyper on coke. It slowed me down.

Sometimes it made me paranoid and impotent, but mostly it just made me withdrawn.

And I was so crazy back then — working all day, partying most of the night — I needed an excuse not to talk. I needed quiet times and I used coke to get them.”