The BBC television and radio presenter was named during Monday night's The One Show, joining a lineup that already includes Peter Andre, Daniel O'Donnell and The Wanted's Jay McGuiness.
She said: "So many elements of Strictly terrify me but I shall try and think #BeyonceAlwaysOnBeat as I hit the dance floor. I'm so excited to indulge that fantasy and hopefully learn some mean moves in the process. Let's get our groove on!"
Anita joined The One Show as a reporter in 2009, before co-presenting Watchdog with Anne Robinson. She was a familiar face on BBC's coverage of the Royal Wedding, and joined Countryfile's presenting team last summer.
Other celebrities already confirmed for Strictly Come Dancing this year include broadcaster Jeremy Vine, chef Ainsley Harriott, EastEnders actress Kellie Bright, Corrie star Georgia May Foote, presenter Katie Derham, weather reporter Carol Kirkwood, and boxer Anthony Ogogo.
Strictly starts on BBC One in September 2015.
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