'It's Always Sunny in Philadelphia' Season 4

'It's Always Sunny in Philadelphia' Season 4: Charlie Day and Kaitlin Olson

Charlie Day and Kaitlin Olson

'It's Always Sunny in Philadelphia' Season 4: Glenn Howerton, Danny Devito, and Charlie Day

Glenn Howerton, Danny Devito, and Charlie Day

'It's Always Sunny in Philadelphia' Season 4: Charlie Day

Charlie Day

'It's Always Sunny in Philadelphia' Season 4: Glenn Howerton

Glenn Howerton

'It's Always Sunny in Philadelphia' Season 4: Kaitlin Olson and Glenn Howerton

Kaitlin Olson and Glenn Howerton

'It's Always Sunny in Philadelphia' Season 4: A scene from Its Always Sunny in Philadelphia

A scene from 'It's Always Sunny in Philadelphia'

'It's Always Sunny in Philadelphia' Season 4: Rob McElhenney and Glenn Howerton

Rob McElhenney and Glenn Howerton

'It's Always Sunny in Philadelphia' Season 4: Glenn Howerton and Rob McElhenney

Glenn Howerton and Rob McElhenney

'It's Always Sunny in Philadelphia' Season 4: The cast of Its Always Sunny in Philadelphia

The cast of 'It's Always Sunny in Philadelphia'

'It's Always Sunny in Philadelphia' Season 4: Rob McElhenney

Rob McElhenney

'It's Always Sunny in Philadelphia' Season 4: Kaitlin Olson

Kaitlin Olson

'It's Always Sunny in Philadelphia' Season 4: Glenn Howerton

Glenn Howerton

'It's Always Sunny in Philadelphia' Season 4: Danny Devito

Danny Devito

'It's Always Sunny in Philadelphia' Season 4: Charlie Day

Charlie Day

'It's Always Sunny in Philadelphia' Season 4: The cast of Its Always Sunny in Philadelphia

The cast of 'It's Always Sunny in Philadelphia'

'It's Always Sunny in Philadelphia' Season 4: Charlie Day

Charlie Day

'It's Always Sunny in Philadelphia' Season 4: Danny Devito

Danny Devito

'It's Always Sunny in Philadelphia' Season 4: The Dumpster Baby Trophy

The Dumpster Baby Trophy

'It's Always Sunny in Philadelphia' Season 4: Glenn Howerton

Glenn Howerton

'It's Always Sunny in Philadelphia' Season 4: Kaitlin Olson

Kaitlin Olson

'It's Always Sunny in Philadelphia' Season 4: Rob McElhenney

Rob McElhenney

'It's Always Sunny in Philadelphia' Season 4: Danny Devito

Danny Devito

'It's Always Sunny in Philadelphia' Season 4: Charlie Day

Charlie Day

'It's Always Sunny in Philadelphia' Season 4: Rob McElhenney

Rob McElhenney

'It's Always Sunny in Philadelphia' Season 4: Kaitlin Olson

Kaitlin Olson

'It's Always Sunny in Philadelphia' Season 4: Danny Devito

Danny Devito

'It's Always Sunny in Philadelphia' Season 4: Charlie Day

Charlie Day

'It's Always Sunny in Philadelphia' Season 4: Glenn Howerton

Glenn Howerton

'It's Always Sunny in Philadelphia' Season 4: Kaitlin Olson

Kaitlin Olson

'It's Always Sunny in Philadelphia' Season 4: Rob McElhenney

Rob McElhenney

'It's Always Sunny in Philadelphia' Season 4: Glenn Howerton

Glenn Howerton

'It's Always Sunny in Philadelphia' Season 4: Kaitlin Olson

Kaitlin Olson

'It's Always Sunny in Philadelphia' Season 4: Rob McElhenney

Rob McElhenney

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