Mario Lopez says no to a "Dancing with the Stars" all-star spot

(CBS News) Don't expect to see Mario Lopez on "Dancing with the Stars" this fall.

The ABC hit show has said the fall season - its 15th - will feature an all-star cast from previous seasons, but details of who will compete won't be announced until just before the show airs.

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While several former contestants have been actively campaigning for a slot on the roster, Lopez, an actor, TV host and "Saved by the Bell" alum, told TV Guide he has too much going on professionally to spare time for the rigorous competition.

"I'm really busy, so I don't think I'll be able to do it," he told the magazine. "I don't watch the show and didn't even watch when I was on it. My mom wanted me to do it."

The "Extra" host and season three dancer spilled the beans about the all-star plans in April when he told Kelly Ripa that "DWTS" had asked him to be one of the contestants. The show made an official announcement about the all-star season shortly afterward.

Meanwhile, Olympic volleyball star Misty May-Treanor, who withdrew from the seventh season of "Dancing with the Stars" because of an injury, is actively campaigningon Facebook for a spot on the all-star cast.

Two other "DWTS" alum - comedian Margaret Choof season 11 and last season's Gavin DeGraw - have told CBSNews.com that they would like to return to the dance floor.