Leo is Part of the Fighting Irish.

AGHHHHHHHH Leo DiCaprio wearing a Notre Dame cap? So sweet. It makes me feel automatically cooler.

 Leo wore it both leaving Premiere nightclub in West Hollywood, California and earlier while going through Vancouver International Airport, probably coming from TIFF, he wore what I think is a Xavier cap. I've got the shirt so...I'm a bit cooler than Leo?

Yeah, no. Still got me beat.