'DWTS' Karina Offers Dance Advice to Will and Kate

Seeing "Dancing with the Stars" professionals Karina Smirnoff and Mark Ballas take a tumble on Monday night just goes to show you that a "dancing oops" can happen to the very best of us. Being that Prince William and Kate Middleton will make their debut post-nuptial dance in front of an estimated billion people, Karina and the "DWTS" cast had a bit of advice for the soon-to-be dancing newlyweds.

When ET Correspondent Mark Steines approached Karina and partner Ralph Macchio about the fall, as well as some advice for Will and Kate, Karina offered the couple should "have a drink and make sure they do a safe routine," while Ralph believed Will needs only to "lock into her eyes" so "they're the only ones in the room at that moment."

Mark Ballas was especially careful not to jinx William and Kate, so he could only "wish them the best" adding if anything bad were to happen, it would make a great story when they're old and gray.

Partner Chelsea Kane points out the royal dance wont be nearly as complicated as Karina and Ralph's routine, joking that Kate doesn't "have to worry about him tripping on [William's] Matrix coat."

Watch a new "Dancing with the Stars" Tuesday on ABC, and don't miss the royal wedding live on April 29th, right here.