Robin Williams' death today followed a troubled past with cocaine and alcohol, and in July this year he checked into rehab again. The 62-year-old actor was seeking treatment at Hazelden Addiction Treatment Center in Minnesota to help him maintain his long-term sobriety.
His representative told TMZ.com: "After working back-to-back projects, Robin is simply taking the opportunity to fine-tune and focus on his continued commitment, of which he remains extremely proud."
In 2006, the comedian checked himself into a substance abuse rehabilitation centre in Oregon after admitting he was an alcoholic following two decades without booze.
His publicist said at the time: "After 20 years of sobriety, Robin Williams found himself drinking again and has decided to take proactive measures to deal with this for his own well-being and the well-being of his family."
The Mrs Doubtfire star also battled with cocaine addiction in the late 1970s and early 1980s, but quit the drug following the death of his close friend John Belushi in 1982 and the birth of his son Zachary in 1983.