Bill Cosby has tweeted a brief message to fans following his arrest on a sexual assault charge.
The message says, "Friends and fans, Thank You." It was sent on Thursday from Cosby's Twitter account.
The 78-year-old comedian was charged this week with drugging and sexually assaulting a woman in 2004 inside his home near Philadelphia.
It's the first criminal case brought against Cosby out of the torrent of allegations that destroyed his good-guy image as America's Dad.
Cosby's lawyer has said the charge is unjustified and predicted her client will be exonerated.
Cosby is free on $US1 million ($A1.37 million) bail pending trial.
