Kaitlin Olson is very good at what she does on It's Always Sunny In Philadelphia, including sinking into a bog in one take.

Kaitlin Olson is so hilarious as Dee on It's Always Sunny in Philadelphia that it's impossible to think of anyone else in the ...

Kaitlin Olson says her kids are "really not happy" about their dad Rob McElhenney changing his name. The 'It's Always Sunny ...

Kaitlin Olson reacted to her husband, Rob McElhenney, changing his name to Rob Mac during an interview with PEOPLE at the 'It ...

Rob McElhenney’s new last name has high potential. But for his wife and “It’s Always Sunny in Philadelphia” co-star, Kaitlin ...

I've watched It's Always Sunny in Philadelphia for a long time, and it's rarely ever triggered this level of emotion from me. Here's why.

Kaitlin Olson is best known for her long-running role as Dee on It's Always Sunny in Philadelphia, but she also shines in ...

Although chaos often unfolds for the gang in ‘It’s Always Sunny in Philadelphia,’ many cast members have been happily married ...

Kaitlin Olson is mostly known for acting in the popular TV series Hacks and High Potential. The actress' husband Rob ...

The longest-running live-action sitcom in American TV history just made its return to the small screen with a perfect Rotten Tomatoes score.

Some teachers walk into a bar…and meet one of television’s most iconic comedic gangs. It sounds like the setup to a bad joke, ...

Kaitlin Olson has assembled a list of 'tamer' It's Always Sunny in Philadelphia episodes for newcomers interested in watching ...