Keith Chegwin is favourite to win the new series of Celebrity Big Brother ahead of Wednesday night's launch show.
The veteran TV presenter, who started out as a child actor, was a regular on TV in the 1970s and 1980s, appearing on shows including Cheggers Plays Pop and Saturday Superstore.
Bookmaker William Hill made Cheggers 11-2 to win even though the line-up will not be officially unveiled until tonight's show.
The company has also cut the odds on former Apprentice star Katie Hopkins to win to 12-1 after a large bet was placed.
Hill spokesman Rupert Adams said: "Inside 24 hours Katie has gone from our best result to our worst result - we might well have underestimated her chances."
Other names in the frame for the show include former EastEnder and Loose Women presenter Nadia Sawalha, George Best's son Calum and former Holby City actress Patsy Kensit.
Also reported to be appearing are former Coronation Street star Ken Morley and soul singer Alexander O'Neal.
Celebrity Big Brother started life as a spin-off of the main show on Channel 4 before both were dropped and then picked up by rival broadcaster Channel 5.
Last year's series, won by US actor Gary Busey, was the second most complained-about show of 2014 - only topped by complaints about the regular version of the show.
