The star insists he's not among the cast for the updated western - but he'd like to be.
He tells BlogTalkRadio.com, ""(It was) a wonderful rumour... I was thinking maybe the guy will want to meet me after he heard this. I would love to work with him; he's wonderful.""
And that's not the only Internet hoax Williams has had to dismiss of late - there was also a death video posted online.
He adds, ""I did see that and I think those things are dangerous for your family and friends.""