12/28/2010 05:12 am ET | Updated May 25, 2011

Allison Williams, Brian Williams' Daughter, Cast In HBO Pilot

This seems to be the first major professional acting gig for Williams who graduated from Yale earlier this year and is pursuing a career as an actress and a singer. The daughter of the NBC Nightly News anchor Brian Williams has gained online popularity with several videos, including the viral That's Why I Chose Yale and her recent performance of the Mad Men theme song (video below).