ABC's hit "Dancing with the Stars" premieres tonight -- minus two original contestants. Warbler Jewel had to bail out because of significant knee injuries, spoiling the show's first ever husband and wife head-to-head match-up. Her husband, rodeo star Ty Murray, will compete for the family's honor. Another contestant, "Access Hollywood" host Nancy O'Dell, also left the show due to injury.

To fill the void, recently jilted "Bachelor" contestant Melissa Rycroft (a former Dallas Cowboy cheerleader) and Hugh Hefner's ex Holly Madison will strap on the dancing shoes! Who will win the big mirror ball?? It's anyone's guess!