In preparation for tonight's premiere of 'Dancing with the Stars,' Jaleel "Urkel" White, Gladys Knight, William Levy, and the rest of the contestants have been seriously breaking a sweat in preparation for their first performances.

For the 2-hour showing, all the celebs had to loosen their hips for either the Foxtrot or the Cha Cha. Thank goodness for the professional dancers at their sides, 'cause football player Donald Driver is probably not the most graceful figure on the dance floor. But who knows. Maybe he'll surprise us.

Or maybe one of the others, like "Platinum Pop Star" Gavin DeGraw or 'Little House on the Prairie' actress Melissa Gilbert, will turn it out and shock America with incredible moves.

Who are you hoping will wow the judges? Browse through photos of their rehearsal sessions below and vote for your favorite contestant.

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