George Constanza on Jenny Craig?

Can you imagine a super-thin George Constanza?

Apparently, Jason Alexander can. People magazine says that the Seinfeld alum has signed up to be the next Jenny Craig spokesperson.

Alexander will join the long line of celebrity spokespeople that have endorsed the product. Queen Latifah, Kirstie Alley, Sara Rue and Valerie Bertinelli have all lent their names to the infamous diet.

The actor says that he plans to shed 30 to 40 pounds. "I will not be wearing a bikini for you," he promises.

Alexander has done advertising for both McDonald's and KFC in the past. More recently, he reunited with the Seinfeld cast on HBO's Curb Your Enthusiasm.