Robin Williams attended an AA meeting before committing suicide.

The 'Hook' star - who was found hanged at his home on Monday(11.08.14) - had checked into rehab in june to treat his alcohol addiction and is believed to have sought support from the group the day before he died.

Comedian and fellow AA member Argus Hamilton said: ''He was at a meeting on Saturday. He had got out of rehab and was sober at the meeting.''

The 63-year-old actor was said to be ''battling demons'' in his attempt to stay sober after quitting drinking in 1982 and relapsing for three years in 2003.

The Academy Award-nominee - who left behind his wife Susan Schneider and three children Zak, 31, Zelda, 25, and Cody, 22 from previous relationships - is reported to have isolated himself and become a recluse in order to ''fine-tune his sobriety''.

A source told The Sun newspaper: ''He became a recluse. He checked into rehab and then shut himself away at home.''

Another added: '' He was battling his demons and had become very isolated.''

Local residents had also noticed a change in the actor in the run up to his death, describing him as a ''shell of himself''.

One said: ''He looked very drawn and thin, not like the Robin who first moved here many years ago.

''He seemed exhausted and not in the best spirits, but still the nice guy I had always known. He was in a bad place emotionally.''