Robin Williams' last tweet was to his daughter

Los Angeles - Robin Williams, who was found dead at his San Francisco Bay area home on Monday, was last active on social media on 1 August.

The veteran comedian's last tweet was to his 25-year-old daughter, Zelda Rae Williams. Williams wished a happy birthday to his daughter with a beautiful photo of the duo when she was younger.

The actor also last updated his Facebook status on 30 July, where he shared the first trailer of the new movie, Night at the Museum: Secret of the Tomb in which he co-stars alongside Ben Stiller.

The Goodwill Hunting star also sent out a tweet to wish himself a happy birthday on 22 July.

Check out the actor's last social media activity:

#tbt and Happy Birthday to Ms. Zelda Rae Williams! Quarter of a century old today but always my… http://t.co/qlsWIu429e

— Robin Williams (@robinwilliams) July 31, 2014