Denise Richards to appear on Charlie Sheen roast?

Denise Richards has reportedly been asked to appear on her ex-husband Charlie Sheen's upcoming Comedy Central Roast.

A source claimed that Comedy Central producers have spoken with Richards about joining the all-star lineup for Sheen's comedy salute, but a deal has yet to be finalised.

The entertainment industry insider went on to reveal that Richards is "interested" in appearing because she sees the event as a chance to poke fun at her rocky marriage to Sheen, adding to Us Weekly: "Denise has a terrific sense of humour."

Richards and Sheen were married for four years and are the parents to two daughters, 7-year-old Sam and 6-year-old Lola.

Another of Sheen's ex-wives, Brooke Mueller, appears to be unwilling to have any role in the roast and has apparently enlisted her legal team to demand that Comedy Central not air any jokes about her alleged drug use.

The Comedy Central Roast of Charlie Sheen will air Monday, September 19 at 10/9c on Comedy Central, opposite Ashton Kutcher's debut on Two and a Half Men.

Earlier this week, Washington DC law enforcement was cleared of any wrongdoing for providing Sheen with a police escort on his way to an April gig.

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Watch amateur footage of Charlie Sheen being roasted by comedian Jeff Ross during his April performance in Atlantic City below (warning: explicit language):