Julianne Hough has denied allegations that she cheated on boyfriend Ryan Seacrest with her Footloose co-star.

"It's all completely untrue," Hough's publicist told People in response to claims she had made out with actor Kenny Wormald at a popular bar in Nashville, TN.

The allegations reportedly came after the on-screen duo had partied together in New York City and danced a steamy performance during last Tuesday night's Dancing with the Stars results show on ABC.

Hough, a two-time Dancing with the Stars champion, last competed on the show during its eighth season in early 2009. She competed with Chuck Wicks, her boyfriend at the time, however the pair later split and she began dating Seacrest -- who is the host of American Idol -- early last year.

After dodging questions and rumors about their dating life for months, Hough, 23, and Seacrest, 36, finally confirmed they were dating late last year.