Donny and Marie Osmond [ tickets ] are hosting an open casting call, which began yesterday (5/13), in search of dancers to be part of their new show at Flamingo Las Vegas, scheduled to open Sept. 9. A team of judges, including the Osmond siblings, will sift through taped submissions to select finalists who will then attend a live audition in early June, according to a press release. Details of the submission and audition process will be posted at the sibling duo's website, according to a press release.