The news was revealed on Monday (7 August) on Nick Grimshaw’s Radio 1 Breakfast Show.
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Mollie King
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Speaking live on the programme, Mollie said: ”I’m so excited that I can actually talk to people about it.
“I’ve known for quite a while and I’m so bad at keeping secrets like this, so i keep slipping up.”
The singer admitted she had already told her parents and two sisters, along with her former bandmate Frankie Bridge, who previously competed on the show.
She also said in a statement released on the ‘Strictly’ press team’s Twitter account: “I’m a huge fan of ‘Strictly Come Dancing’ so I can’t actually believe I’m lucky enough to be taking part in it this year!
“I’m literally so excited to learn Latin and ballroom dancing, and of course I can’t wait to get into the sequins too!
“It’s going to be a lot of hard work but I’m ready for the challenge.”
'Strictly Come Dancing' 2017: All The Rumoured Contestants
Brian Conley(01 of15)
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Just hours after Mollie was confirmed, fresh reports suggested that Brian had "signed up" to be this year's comedy contestant. (credit:Karwai Tang via Getty Images)
Paula Radcliffe(02 of15)
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'Strictly' bosses are said to be "desperate" to sign up the record-breaking runner for the new series, with reports suggesting she's now mulling over whether or not to take part.
His wife, Christine Bleakley, took part in the sixth series way back in 2008, and almost a decade on, it seems it could be Frank's turn.
According to The Sun, the footballer "ticks all of producers' boxes", and his numerous appearances on sports-based panel shows have convinced bosses that 'Strictly' would be the right move for him. (credit:Robbie Jay Barratt - AMA via Getty Images)
Tommy Cannon(04 of15)
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One half of veteran comedy duo Cannon and Ball, Tommy would be the oldest contestant in 'Strictly' history if he were to sign up for the show.
Having triumphed in 'The X Factor' almost a decade ago, an insider told The Sun that the 'Broken Heels' singer was keen to use rival show 'Strictly' to "relaunch her TV career". (credit:rune hellestad via Getty Images)
Joe Wicks(06 of15)
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Similarly, the Body Coach confirmed that he'd been approached to appear on 'Strictly Come Dancing', but said his involvement was dependent on scheduling.
Watch this space, we say. (credit:Mike Marsland via Getty Images)
Steph and Dom Parker(08 of15)
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The potential 'Strictly' double act we're most excited about, though, is Steph and Dom from 'Gogglebox'.
Following the success of Scarlett Moffatt in 'I'm A Celebrity', it's been claimed that producers are eyeing both halves of the telly-loving couple to appear on 'Strictly' this year.
He already had success in the 'Strictly' Christmas special in 2013, but after performing on the show last year, The Sun has claimed that Bros singer Matt has agreed to join the 2017 line-up. (credit:Barcroft Media via Getty Images)
Angela Scanlon(12 of15)
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Thanks to 'The One Show' and 'Robot Wars', Angela's presenting career has gone from strength to strength in recent times, and if rumours are to be believed, she'll be winning herself a legion of new supporters on this year's 'Strictly'. (credit:David M. Benett via Getty Images)
Tim Peake(13 of15)
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The astronaut was said to be a hot favourite for the show shortly before the 2016 line-up was revealed, though he was swiftly ruled out due to a rehabilitation programme which meant he was re-learning how to walk again.
Could 2017 be his year? (credit:Barcroft Media via Getty Images)
Olly Murs(14 of15)
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Former 'X Factor' host Olly Murs was a surprise addition to the 'Strictly' rumours list earlier this year, when it was suggested he'd signed up as a way of bouncing back from a break-up.
While we're sure the Happy Mondays singer would provide amazing entertainment value on 'Strictly', he's already told bosses where to go after they approached him to take part.