Julianne Hough: `Tom Cruise is astonishing`

The actor has to belt out hits such as Bon Jovi's Wanted Dead Or Alive and Journey's Don't Stop Believin', in his role as '80s rocker Stacee Jaxx, and Julianne said that she was blown away when she first heard him.

'I'm not kidding, the guy can sing,' she told MTV News. 'The guy can dance, the guy obviously can act. I mean, he can do it all, and he does it all very well.

'I wasn't there for the first day of shooting for his stuff, but I just got people emailing me, like, 'Oh my gosh' chills, standing ovation, holy crap, the crew was blown away,' she said. 'And I'm like, 'I missed it! What the heck?' So, he's astonishing.

'There are no words to describe how amazing Tom is. I mean, he's so in it.'

Hough, 22, plays lead character Sherrie Christian in the forthcoming film, which also stars Alec Baldwin, Russell Brand and Mary J. Blige.

And she added that the set is fun to be on. 'It's hilarious. None of us take each other seriously, because we are all decked out, '80s-style,' she explained. 'Alec Baldwin is wearing a blond wig. I mean, having Russell Brand on set is a hoot in itself. We are literally having the time of our lives.'