Girls fans, a fun fact to make your head explode: Charlie's inevitably doomed to be dumped rebound girlfriend Audrey, was actually Lena Dunham and her producers' first choice to play Marnie, before Allison Williams came along.

Audrey is actually Audrey Gelman, Dunham's best friend in real life, hence the desire to cast her as her TV BFF. Gelman opted to play the recurring Audrey instead so she could remain a spokeswoman for Manhattan borough president Scott Stringer. Now imagine a world where we don't have Allison Williams gracing us with moments like Marnie's brave rendition of "Stronger." 

[via Page Six]