Charlie Day, Kaitlin Olson, and Andy Buckley in It's Always Sunny in Philadelphia (2005)

Charlie Day and Adrianne Palicki in Drunk History (2013)

Charlie Day and Glenn Howerton in It's Always Sunny in Philadelphia (2005)

Danny DeVito, Charlie Day, and Glenn Howerton in It's Always Sunny in Philadelphia (2005)

Charlie Day in It's Always Sunny in Philadelphia (2005)

Danny DeVito and Charlie Day in It's Always Sunny in Philadelphia (2005)

Ice Cube, Conan O'Brien, Charlie Day, JoAnna Garcia Swisher, Tracy Morgan, Andy Richter, and Jillian Bell in Conan (2010)

Charlie Day, Kaitlin Olson, and Glenn Howerton in It's Always Sunny in Philadelphia (2005)

Ice Cube and Charlie Day in Fist Fight (2017)

Charlie Day, Tracy Morgan, and Jillian Bell in Fist Fight (2017)

Charlie Day and Bill Kottkamp in Fist Fight (2017)

Charlie Day and Alexa Nisenson in Fist Fight (2017)

Charlie Day and Jillian Bell in Fist Fight (2017)

Charlie Day and Kumail Nanjiani in Fist Fight (2017)

Charlie Day and Christina Hendricks in Fist Fight (2017)

Charlie Day and Tracy Morgan in Fist Fight (2017)

Charlie Day and Gina Rodriguez in I Want You Back (2022)

Charlie Day in Saturday Night Live (1975)

Danny DeVito, Charlie Day, Rob McElhenney, Kaitlin Olson, and Glenn Howerton in It's Always Sunny in Philadelphia (2005)

Jennifer Aniston, Jason Bateman, Jamie Foxx, Charlie Day, Jason Sudeikis, Christoph Waltz, and Chris Pine in Horrible Bosses 2 (2014)

Jason Bateman, Charlie Day, and Jason Sudeikis in Horrible Bosses 2 (2014)

Jennifer Aniston, Kevin Spacey, Jason Bateman, Charlie Day, Colin Farrell, and Jason Sudeikis in Horrible Bosses (2011)

Drew Barrymore, Christina Applegate, Charlie Day, Justin Long, and Jason Sudeikis in Going the Distance (2010)

Melanie Lynskey, Cy Carter, Charlie Day, and Mary Elizabeth Ellis in A Quiet Little Marriage (2008)

Charlie Day, Rob McElhenney, Kaitlin Olson, and Glenn Howerton in It's Always Sunny in Philadelphia (2005)