Rachel Bilson has been cast in the much-anticipated 100th episode of
How I Met Your Mother, according to
EW.
It's not clear whether the 28-year-old actress will play
the mother (as in the show's title) or the mom's sister, best friend or some other relation.
FYI: The show revolves around Ted (
Josh Radnor) recounting to his son and daughter the events that led to his meeting their mother.
How I Met Your