The Irish model, best known for dating Calum Best, is using the reality show to launch her career in the UK.
Andrea Roche Model Agency announced on Facebook: "We are extremely proud of georgia salpa who has entered the Big Brother house - what a fantastic kick off for launching her in the UK- Best of luck Georgia! X"
Salpa, 26, was rumoured to be taking part in last year's series of I'm a Celebrity... Get Me Out of Here as a love interest for the eventual runner-up Mark Wright.
Mean Girls actress Lindsay Lohan, X Factor reject Frankie Cocozza, Hollywood actor Michael Madsen and ex-TOWIE star Kirk Norcross are among those tipped to join this year's lineup.
Celebrity Big Brother premieres tomorrow night (Thursday) at 9pm on Channel 5.
> Celebrity Big Brother 2012: See inside the new house in pictures
Watch a tour of the new Celebrity Big Brother house below:
Scroll through a gallery of rumoured contestants on Celebrity Big Brother 2012 below: