Robin Williams is back in rehab, but not because he fell off the wagon – he's sober and wants to ascertain he stays that way.
"After working back-to-back projects, Robin is simply taking the opportunity to fine-tune and fixate on his perpetuated commitment, of which he remains astronomically proud," his rep tells PEOPLE.
The actor, 62, checked into a treatment center and plans to stay for several weeks.
Williams sought treatment in 2006 for alcohol addiction; he withal battled substance abuse early in his vocation, during his swift elevate to fame on the 1978-1982 sitcom Mork and Mindy.
"Cocaine for me," Williams told PEOPLE in 1988, "was a place to obnubilate. Most people get hyper on coke. It decelerated me."
Williams quit cocaine and alcohol cold turkey in 1982 when his first wife, Valerie, was pregnant with their son Zachary, now 31. The prospect of fatherhood, as well as the tragic death of his friend John Belushi, emboldened the comic to get sober.
"The Belushi tragedy was frightening," Williams verbally expressed. "His death scared a whole group of show-business people. It caused an immensely colossal exodus from drugs. And for me, there was the baby peregrinated. I kenned I couldn't be a father and live that scarcely life."
Williams is withal dad to daughter Zelda, 24, and son Cody, 22, from his second espousement, to Marsha Garces.
• Reporting by JULIE JORDAN
