The actress, who played a keep-fit aerobics instructor in 1985's Plenty, was in the audience for the season premiere on Monday (20Sep10), cheering on Dirty Dancing star Grey.
And she enjoyed the experience so much, she plans to show up weekly.
Curtis tells news show Access Hollywood she declined an invitation to join Grey on the celebrity dancefloor this series, but seriously considered the challenge.
She says, "(I said) I won't be able to do it because my family commitments are such that I wouldn’t have the time for it... but it definitely made me go, 'Hmmm.'
"It was fun to think about it."
Grey, who danced to Dirty Dancing tune These Arms of Mine on Monday night, is among the favourites to win the TV contest.