Channel 5 will air a second run of the reality show at the end of the summer and the former EastEnders star is rumoured to have landed a big money deal to appear on the show.
Fergison played Heather Trott in the BBC soap for five years, but was killed off last month. According to The Sun, she will pocket £175,000 for the deal.
Ex-News of the World journalist Paul McMullen, Swedish footballer Freddie Ljungberg, Bachelor star Carianne Barrow and controversial journalist and TV producer Samantha Brick are also among the rumoured lineup.
Model and DJ Jakki Degg is also reportedly taking part.
The January edition of Celebrity Big Brother was a ratings hit for Channel 5 and was won by Loose Women star and actress Denise Welch.
> Celebrity Big Brother: Model Jakki Degg signed up
> Big Brother to stay on Channel 5 for two more years