One's the Biggest Loser, one has been cozying up to Bradley Cooper and one makes you laugh on The Daily Show

By Cara Lynn Shultz
Updated May 25, 2011 02:35 PM
Credit: Startraks; Sipa; NBC

First it was the Jennifers (Aniston, Garner, Lopez). Then it was the Jessicas (Alba, Biel and Simpson).

Now, Olivia is the name du jour, with three stars boasting the moniker. Can’t tell them apart? Don’t worry, we’ve got your cheat sheet right here:

Olivia Wilde

Best Known for: Her role as troubled doctor Thirteen on the hit Fox show, House
Love Life: After splitting from husband Tao Ruspoli, this Olivia was linked to Justin Timberlake and, most recently, Bradley Cooper.
Did You Know?: She famously locked lips with Mischa Barton during a girl-on-girl kiss during The O.C.‘s second season

Olivia Munn

Best Known for: This Olivia is familiar to techies as the co-host from G4’s Attack of the Show, but the actress/model is more popularly known from her gig as a Daily Show correspondent.
Love Life: After splitting from Star Trek actor Chris Pine, this Olivia was spotted getting cozy with Glee star Matthew Morrison.
Did You Know?: This Olivia plays the snooty hostess who gives Tina Fey and Steve Carrell a hard time in Date Night.

Olivia Ward

Best Known for: Winning the recent season of The Biggest Loser with a total loss of 129 lbs.
Love Life: She’s married to Ben Ward, who lost more than 100 lbs., while she competed on the show.
Did You Know?: This Olivia is also an opera singer in New York.