Best known for her role as heart surgeon Mo Effanga on the BBC One hospital drama, she's no stranger to a high-pressure environment - but we suspect learning the moves and performing live every week will present quite a different set of challenges for the actress!
Kate, who finished in eighth position out of 14 contestants, asked Charlotte: "What we need to know Charlotte is, 'Are you going to do well?' I was a disgrace, Richard was better". That was then, this is now and this is my chance to have even more sequins!'
The most famous victim of the supposed curse if Louise Redknapp, as she supposedly split with her husband of 16 years, Jamie Redknapp, after taking part last year but did not couple up with her dance partner.
She added: "I am so excited to be joining this year's Strictly cast!"
In 2014, she made her West End debut playing Rachel Marron in the stage musical adaption of The Bodyguard and received a nomination for Best West End Newcomer at the West End Frame Awards.
But does she have what it takes to take the top spot on Strictly?
The actor, 41, previously showed his dancing skills off in 2015 alongside co-star Eleanor Fanyinka in a short sequence titled Holby City Does The Strictly.
Ex Holby star Chizzy Akudolu becomes 12th celebrity in Strictly 2017 line-up
Presenter and newsreader Charlotte, 42, told ITV viewers: "The 11th contestant to join Strictly Come Dancing 2017 is... me".
More celebrity contestants will be announced later today.
Also ready to waltz into the competition are Scottish comedian Susan Calman, former JLS singer Aston Merrygold, Sunday Brunch host Simon Rimmer and comedian Brian Conley.
The Saturdays Mollie King, Eastenders star Davood Ghadami, Loose Women and This Morning presenter Ruth Langsford, and soap actress Gemma Atkinson.
The final four contestants will be revealed later today.
Ex- head judge Len Goodman also had a special message for the three, appearing in a video link: "Good luck".
Worldwide ballroom champion Shirley Ballas will be taking on head judge alongside Bruno Tonioli, Darcey Bussell and Craig Revel Horwood.