The comic was taken to a hospital in New Brunswick, New Jersey, on Saturday (25Sep10) after suffering an alleged accidental drugs overdose and passed away four days later.
Now Hasselhoff, who appeared alongside Giraldo in a Comedy Central Roast in August (10), is leading tributes to the funnyman,
In a post on his Twitter.com page, Hasselhoff writes, "Greg Giraldo was a fantastic gentleman with a great heart! And I am deeply saddened by this news!"
Ghost Whisperer actor Jamie Kennedy also offered his condolences, writing on Twitter, "Greg Giraldo. The world has lost a brilliant mind. I was very fortunate to watch Greg at the laugh factory many times. He was gut busting. RIP."
Comedienne Sarah Silverman praised the late star for being "belly-laugh hilarious, prolific, good & kind."