Courtney Thorne-Smith (born November 8, 1967) is an American actress. She is best known for her roles as Alison Parker on Melrose Place, Georgia Thomas on Ally McBeal, Cheryl in According to Jim, and her recurring role on Two and a Half Men as Lyndsey McElroy.

Who played lindsay on two and a half men? OK. Let's think. My stream of consciousness:
The relevant information to answer the above question is: She is best known for her roles as Alison Parker on Melrose Place, Georgia Thomas on Ally McBeal, Cheryl in According to Jim, and her recurring role on Two and a Half Men as Lyndsey McElroy. The answer is Courtney Thorne - Smith.