The troubled actress - who stars alongside the actor in 'Scary Movie 5' - will guest star on his hit show, 'Anger Management' just before she starts a 90 day stay in rehab.
Lindsay will play herself as a patient at Sheen's therapy clinic, with the storyline making fun of her real life problems, according to E! News.
The pair filmed a love scene for the show yesterday (26.03.13), and Lindsay - whose character will find herself going to jail in the episode - posted pictures of herself with extras posing as inmates on her Instagram account.
The actress has reportedly been the perfect employee on set, with a source telling TMZ: ''Lindsay knew her lines cold and her timing was perfect. She was really funny. (She) proved she has talent. You watch her and you know why she became a star.''
The episode, which is aptly titled 'Charlie and Lindsay', is set to hit TV screens in April.
The duo became friends after filming 'Scary Movie 5' last year and Charlie even gave the actress $100,000 to pay a tax bill.