It's Always Sunny In Philadelphia: This Theory About The Waitress Will Blow Your Mind

9. A Bit Of Background

The Waitress (played by Mary Elizabeth Ellis who, interestingly, is Charlie Day's real wife) has been a recurring character since season 1. Throughout the show she is seen dealing with homelessness, alcoholism, and extremely low self-esteem and, to make matters worse, she had done the deed with Dennis AND Frank before eventually sleeping with Charlie in season 12.

Charlie's relationship with The Waitress is strained to say the least. She has frequently told him that she is not interested, she has filed restraining orders against him and treats him like dirt when they eventually do get together. This is where things start to get interesting.

It is alluded to that The Gang and The Waitress have known each other since High School and Charlie has always had a crush on her from afar, but when things begin to get "real" between them, Charlie realises that The Waitress is not all that he thinks she is, causing him to lose interest in her.

Is this a simple case of a dog chasing a car and not knowing what to do when it catches up with traffic? Perhaps. This theory doesn't dispute Charlie's passion but it shows that it's simply directed at the wrong person...