It's Always Sunny in Philadelphia Season 1 Characters & Cast — No Spoilers
Every character in It's Always Sunny in Philadelphia season 1 with photos and the actors who play them, including Charlie Day, Glenn Howerton, Rob Mac — spoiler-free, nothing from later seasons.
- Charlie Kelly — played by Charlie Day
- Dennis Reynolds — played by Glenn Howerton
- Ronald 'Mac' McDonald — played by Rob Mac
- Dee Reynolds — played by Kaitlin Olson
- Waitress — played by Mary Elizabeth Ellis
- Charlie's Mom — played by Lynne Marie Stewart
- Carmen — played by Brittany Daniel
- Chris Murray — played by Dennis Haskins
- Homeless Man — played by Patrick Gorman
- Curator — played by Ted Rooney
- Detective — played by Chris Hendrie
- Police Clerk — played by Don Scribner
- Colin — played by Michael Rosenbaum
- Detective Jones — played by Robert Blanche
- Construction Worker — played by Dennis Hogan
- Construction Worker #2 — played by Dennis Hart
- Executive — played by Lisa LoCicero
- Girl with Braces — played by Kelsie Lynn
- Tammy — played by Jaimie Alexander
- Billy — played by Ryan Alvarez
All seasons of It's Always Sunny in Philadelphia: full spoiler-free character guide