It's Always Sunny In Philadelphia: 10 Things That Need To Happen Before The Show Ends

Charlie Kelly's mother is such an endearing presence on the show. Her sweet and upbeat energy is the complete antithesis of the series' gratuitous vibes, but she's still able to fall into the levels of debauchery that the rest of the characters share. We know what aspects of himself Charlie gets from his mother, but what about his dad?

The series makes many allusions to Frank being Charlie's birth father, making their strange Gruesome Twosome living arrangements all the stranger. Still, before the show is out, fans need to have this either confirmed or denied. Whatever way it goes, there is plenty of hilarious potential.

If Frank is officially revealed to be Charlie's dad, then how would that affect their dynamic? On the other hand, if it turns out that the story given by Bonnie - Charlie's mum - isn't true, then who is his biological father, and how would Frank feel about it?

Sometime in the coming seasons, Charlie and Frank need to take their blood bucket and get it to a DNA testing facility, in order to put an end to this long-spanning mystery. Viewers could either receive the obvious answer or get swerved by something else entirely; either way, answers are needed.