During a recent rehearsal for Fox 's upcoming, live broadcast of the musical "Grease," Aaron Tveit and Julianne Hough waited for their musical cue to jump in the fray and gambol alongside a troupe of frenetic dancers.
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Derek & Julianne: Growing Up Hough | TWINKLE TOES | When they moved to the U.K., the youngsters lived with family friend Shirley Ballas, her husband Corky and son Mark (here in a 1998 portrait). The Houghs, says Shirley, a ballroom dancer and teacher, "had the word star on their foreheads." So did Mark, who later joined his pals as a pro on Dancing with the Stars.