set costume dancing with the stars Kirstie Alley

Kirstie Alley and her fellow DWTS alum came together Monday for the premiere of Dancing With the Stars: All-Stars, but instead of going after the coveted mirror ball trophy, the 61-year-old actress has her eyes on another prize!

"I don't give a you-know-what about the mirror ball, I want to just be a size zero like the other girls on the show," Alley revealed in a new video interview with partner Maksim Chmerkovskiy. "Just for five minutes -- I don't even care if the next day I balloon up to a two." The enthusiastic Cheers actress remarkably shed a reported 100 lbs. after competing on the show in 2011, going from a size 14 to 6, so you know she's determined!

Kirstie, along with many former DWTS stars including Pamela Anderson and Chaz Bono, were all gathered for what could be the show's most competitive season yet! Wonder who'll be the first to go?

Click through the pics to see who else arrived for the festivities!