Yesteryears glamour girls Zeenat Aman and Mandakini may soon be raising the mercury levels on Colors' reality show "Bigg Boss 4" if everything falls in place.

Both the actors are known for their sensuous appeal on the big screen. While Zeenat, 58, has been accredited for popularising the western look in Indian cinema, Mandakini hogged the limelight for her skin show in movies like "Ram Teri Ganga Maili".

"There is a possibility that Zeenat-ji and Mandakini will be part of 'Bigg Boss 4'. Nothing is confirmed yet but there is a strong possibility, " a source told.

"Aftab Shivdasani might also be among the contestants on the show this time, " added the source.

"Bigg Boss 4", starting Sunday, will be hosted by Bollywood superstar Salman Khan.

If rumours are to be believed, bar dancer Tarannum, petty thief Davinder Singh aka Bunty, apart from actors like Shakti Kapoor, Shweta Tiwari and Sara Khan will also be on the show, where celebrities are locked up inside a house for three months without any communication with the outside world.

Rumours were also rife about the participation of Hollywood girls Pamela Anderson and Kelly Brook, but the channel has refused to comment or confirm any name.