It's Always Sunny In Philadelphia: 10 Cameos You (Probably) Missed
2. Tiffany Haddish
Before she was famous, Tiffany Haddish had a cameo as Stripper #3 in Season 2, Episode 1, "Charlie Gets Crippled." When Frank takes Charlie to the strip club, where Frank pretends like he needs a wheelchair too, they meet several strippers. The one Frank talks to is Tiffany Haddish. Although she wasn't famous yet when this was aired, it's not easy to recognize her when re-watching it today.
Tiffany Haddish is an actress and producer who is well known for movies like Keanu and Girls Trip. She also does voice acting for movies like The Lego Movie 2: The Second Part and The Secret Life of Pets 2.