Thirteen hopeful celebrities are gearing up for the new season of "Dancing with the Stars" -- and they're showing off their moves on the new "Extra" set!

Snarky senior Cloris Leachman may be the oldest competitor to ever grace the dance floor on "DWTS" -- but she's letting her competition know that she's not going anywhere. "You big baby, if you win I'm going to be so mad at you -- I won't have it!" Leachman warns fellow comic and dancer Jeffrey Ross. The funnyman responded with a joke, assuring Cloris he wasn't the star-turned-dancer she'd have to worry about, saying, "I have a better chance of winning the Westminster Dog Show"

Quick-footed champ Cheryl Burke also gave "Extra" a sneak peek of her moves -- and the costumes to be worn by her partner, Olympic gold sprinter Maurice Greene. "He always wears sequins -- whenever we go out he has rhinestones on his shirt."

Don't miss the stars stepping into their dancing shoes when "DWTS" premieres tonight on ABC.