The 24-year-old revealed that the scene was left out of the film, claiming that it was too "sexy" to make it into the final cut.
"It was a little too hot and steamy and sexy. It will be on the director's cut, though," Hough said of the scene during an interview on Live! with Kelly.
"Let's just say I'll always have that in my back pocket, that I gave Tom Cruise a lap dance."
In the same interview, Hough confessed that she wrote Daniel Radcliffe a love letter on the set of Harry Potter and the Philosopher's Stone.
The actress recently revealed that she is very competitive with her boyfriend Ryan Seacrest, who she has been dating for two years.
Watch a trailer for Rock of Ages below: