Denise Richards is denying ex Charlie Sheen's claims that she cashed in a $1 million check he wrote her "as a joke." The Real Housewives of Beverly Hills alum, 54, shared an Instagram Stories post on Thursday, October 23, showing the check she once received from Sheen, 60. "Found this during my recent move. I never cashed it, @charliesheen," she wrote over the image of a Wells Fargo check for $1 million. "Is it still good?" she joked.