Olivia Jane d'Abo (born 22 January 1969) is an English actress, voice actress, and singer-songwriter. She is best known for her roles as Princess Jehnna in Conan the Destroyer (1984), Karen Arnold on The Wonder Years, Mara Simons in Beyond the Stars (1989), Angela in Point of No Return (1993), Betty Jo in Wayne's World 2 (1993), Molly Richardson in Greedy (1994), Marie Blake on the NBC sitcom The Single Guy, Anna Montgomery in The Big Green (1995), Tracey Meltempi in It Had to Be You (2000), and Nicole Wallace on Law & Order: Criminal Intent.

She has voiced the characters of Jane Porter in the Disney Channel animated series The Legend of Tarzan and the movie Tarzan & Jane, Rox in the 'Matriculated' segment of The Animatrix, Natalia Romanoff / Black Widow in the animated movies Ultimate Avengers 1 & 2 , Luminara Unduli in the animated series Star Wars: The Clone Wars and in the film Star Wars: The Rise of Skywalker.