Metcalfe has played Mercedes Fisher on the Channel 4 soap since 2006, a character who is known for her fiery temper and sharp tongue.
However, the actress claimed that she couldn't be more different to Mercedes and that her real personality will come across when she appears on the show next year.
"I'm totally different, and people will see that from the shows," she told DS. "I don't know if that's a good thing or not but they will see that I'm nothing like my character."
Metcalfe also confessed that another one of the reasons she signed up for the ITV show was to stop herself becoming complacent with starring on Hollyoaks.
"I get very comfortable playing Mercedes because I've played her for so long, it's just easy," she explained. "It was about shaking myself outside of my comfort zone a little bit and giving myself a new challenge."
Dancing On Ice begins on January 6, 2011 on ITV1.