"I'm so excited and so excited I can talk about it. I've known quite a while but so happy I can now tell people, because I'm so rubbish at keeping secrets!"
The beauty added that she is "ready for the challenge and hard work" that the show is going to bring.
King said: "It's something that I always said I wanted to do".
She also said she was a huge Britney Spears fan and would love to dance to her music on the show.
The Saturdays' star had been heavily rumoured for the new series so it's no real shocker to see her confirmed for the line up. "I've always watched it with my family and it looked so fun".
More stars will confirmed regularly over the next few weeks until the show's launch show which will be filmed in September. "She was so excited. I'm very competitive so watch out, other contestants, I'm taking you down!" There is a new rumour that comedian Brian Conley will be joining Strictly as a contestant, as a source told The Sun: "Brian is all signed up for the show and is sure to be a laugh a minute".
The girls have yet to publicly comment on Mollie's exciting Strictly Come Dancing news. "I'm really nervous so I've just got to throw myself in". Shirley Ballas, former British Open To The World Latin American champion and ballroom champion, will take over from Len Goodman as head judge, after he stepped down last series.