The popstar-turned-TV presenter will follow in the footsteps of her former Loose Women co-star Denise Welch and enter the reality TV house next week, according to the Daily Star.
Big Brother bosses are expecting controversy from Nolan because glamour model Rhian Sugden is also taking part in the series.
Sugden had a sex text relationship with TV presenter Vernon Kay and Nolan is known to be a close friend of Kay's wife Tess Daly.
Nolan's previous reality TV appearances include spots on Celebrity Fit Club and Dancing On Ice.
Other celebrities rumoured to be taking part include Duane Chapman aka Dog the Bounty Hunter, former EastEnders actress Cheryl Fergison, Sex, Lies And Rinsing Guys documentary star Danica Thrall, So Solid Crew's MC Harvey, Simon Cowell's ex Jasmine Lennard, comic Julian Clary and Corrie icon Julie Goodyear.
Celebrity Big Brother launches on Wednesday, August 15 at 9pm on Channel 5.
The Celebrity run will last 23 days.
Watch Brian Dowling talking about Celebrity Big Brother below: