The singer follows in the footsteps of The Saturdays' Frankie Sandford, Andy Murray's mum Judy, This Morning reporter Alison Hammond and ex-rugby star Thom Evans in joining the BBC One show's cast.
Simon said: "I am so happy to be joining the team and I cannot wait to get started. I'm hopeful that Strictly Come Dancing will help me to improve on my daddy dancing skills. I want to make my daughter proud and no doubt she will be teaching me a pirouette or two along the way."
The star - who has a 17-year-old daughter - isn't a total stranger to the dancefloor. He appeared in the Strictly Come Dancing Christmas Special back in 2011.
We wonder if he's remembered any of his old moves?!
Simon shot to fame as a member of boy band Blue alongside Duncan James, Antony Costa and Lee Ryan. They scored 40 number one singles worldwide and sold 16 million records. Insane.
Most recently they reunited to take part in ITV show Big Reunion.
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