Donny Osmond will apparently have to wait a little longer to follow in his sister's footsteps as a Dancing with the Stars celebrity participant.

Osmond will not be able to compete on Dancing with the Stars upcoming eighth season since he is currently working with his sister Marie as the headlining act at Las Vegas' Flamingo hotel, Robin Leach reported in a Friday posting on Luxe Life, his Las Vegas Weekly blog.

"There just wasn't sufficient advance lead time to change the time of their Flamingo show and the schedules of everybody involved with it," a source told the former Lifestyles of the Rich and Famous host.

However Osmond will still apparently have an opportunity to show America his dance moves, as the source added that the 51-year-old will be available for Dancing with the Stars' ninth season in the fall.

While the Osmond's Flamingo contract takes them through October 2010, Donny Osmond would reportedly be able to commute between Las Vegas and Los Angeles (where Dancing with the Stars' live broadcasts tape place) in time for any Flamingo shows scheduled on Mondays and Tuesdays this fall.

"It also gives him a little longer to build up his strength," the source told Leach.  "The Dancing show requires a lot of stamina, and with their nightly show at the Flamingo, it will be a Herculean effort of super fitness to avoid injuries as some of the stars experienced last season."

Osmond has recently been telling Las Vegas radio stations that he was "considering doing the show," and Leach reported earlier this month that he had even started taking dance lessons.

"It never hurts to take dance lessons," Dancing with the Stars co-host Samantha Harris told Leach earlier this month. "Donny would be incredible for our show."

Marie Osmond participated in Dancing with the Stars Fall 2007 fifth season and finished third with professional partner Jonathan Roberts.

"[Donny] knows what's involved because he was there for every show that sister Marie danced in," Harris told Leach.  "He really gave her tremendous support, and I'm certain if he takes part, the roles will be reversed and Marie will be there in the audience cheering him on for every show."