It's Always Sunny In Philadelphia: 10 Cameos You (Probably) Missed
4. Melanie Lynskey
Melanie Lynskey plays a woman, Kate, looking for a surrogate in Season 5, Episode 1, "The Gang Exploits the Mortgage Crisis." Dee thinks being a surrogate would be a sweet deal and jumps on the opportunity. Since Kate is so sweet and soft-spoken, Dee walks all over her and takes full advantage of the situation for as long as she can.
Lynskey is known for acting in Up in the Air, Togetherness, and Heavenly Creatures. She also played the stalkery neighbor in Two and a Half Men.