Paul Rudd Proves He's The Ultimate One Direction Fan

The actor took #fangirlhardorgohome to another level on SNL Saturday night.

This is Dan Charles.

He's One Direction's biggest fan.

NBC / Via Twitter: @MattBellassai

Don't even try to mess with him. He knows everything. Literally, everything.

Just watch.

1D forever!

NBC / Via kristal.screeninvasion.com