With the tragic news of Robin Williams death we're all remembering some of our favorite moments from Robin Williams. I remember him when he first appeared on 'Happy Days' and later his own spin-off as Mork on 'Mork and Mindy'

His first appearance on 'The Tonight Show with Johnny Carson' happened in 1981 when he was about to start his fourth season of 'Mork and Mindy' and was on to promote his first movie 'The World According To Garp.'

Look how young he is! He was just 30 years old back then.

Such a tragedy to lose one of the best comedians of all time.