She's treading the boards in the West End in hit show 9 to 5: The Musical and a new promo pic shows that she looks totally different!
Fans of the Alicia Munroe actress are used to seeing her with her hair scrapped back and a far more serious face.
But in the new image, she looks happy and sophisticated with her hair down around her shoulders.
Chelsea is taking over from Amber Davies in the role of Judy Bernly for the remaining run of the musical at London's Savoy Theatre.
Speaking about her new role, Chelsea told Broadwayworld.com: "I've wanted to do a musical for a long time.
I've wanted to do a musical for a long time.
"When the opportunity came through, I thought it was the opposite of what I've done before, which was attractive; it was an amazing chance to try something new."
She also told how she'd "love to stay on stage".
However, Chelsea - who played Amy for three years from 2010 - ruled out a return to the ITV show.
She told the Daily Star she had no interest in heading back to the Yorkshire Dales to play hard-living Amy.
Chelsea reasoned: "There would be no point in leaving one long-running show to go back to the one you were in before.
"There are other things in my career that I'd like to do. For now, it's a 'no'."
Emmerdale went on to recast the role, with Natalie-Ann Jamieson taking over the part.
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