The TV and radio presenter confirmed the news to Radio 2 DJ Zoe Ball after weeks of speculation that she was taking part.
Feltz told Radio 2 colleague Zoe Ball she was "inordinately excited".
Appearing on the station's Breakfast Show, she said: "I've got sequins on my lingerie - can I say that? - and I intend to wear nothing but sequins until I get turfed out, which will probably be rather soon, I fear."
She also said she wanted a partner who was 'virile' but 'patient' to help her cope on the dancefloor.