Tappenden, who works as a glamour model under the name Nicola T, is currently seeing Plymouth Argyle's Simon Walton. She dated Fulham striker Bobby Zamora for two years until 2007.
The 26-year-old has previously appeared in ITV2's WAG's Boutique.
According to the Daily Star, ITV1 bosses are keen to replicate the success they had with WAGs Nicola McLean and Carly Zucker on last year's show.
Snooker star Jimmy White, the Jackson family, footballer Paul 'Gazza' Gascoigne, Brian Blessed and Sam Fox have all been tipped to appear on the ninth series of the jungle-based reality show.
I'm A Celebrity... will return to ITV1 in November.