The Baywatch actor - who left the NBC talent competition last season - was recently announced as one of the celebrities who will take to the dancefloor this month.
"I'm so happy for him. I think he's going to do great on the show," Sharon Osbourne told Access Hollywood.
"Try keeping me away! I love the show, I will be there [in the audience]!"
Howie Mandel - who stepped in to replace Hasselhoff - joked: "You know what's interesting? David Hasselhoff is on the show and Brandy is on the show. They were both judges on America's Got Talent. Do you realise that makes me four years away from dancing!?"
Host Nick Cannon also voiced his support, saying: "I'm voting for the Hoff. He's going to be Hoff the chain, Hoff the dance floor. All that Hofful stuff", while former host Jerry Springer noted that Hasselhoff was partnered with Kym Johnson, the same professional dancer that he performed with during his own stint on the contest.
Johnson recently described Hasselhoff as the "perfect partner" because he is not afraid to have fun in the ballroom.
Dancing With The Stars premieres September 20 on ABC.