Olivia Jane d’Abo is an English-American actress, singer, and songwriter. She is known for her role as Karen Arnold, Kevin Arnold’s rebellious teenage hippie sister in the ABC comedy-drama series The Wonder Years, and recurring villain Nicole Wallace in Law & Order: Criminal Intent.
D’Abo was born in London, England, the daughter of Maggie London, an English model and actress primarily active in the 1960s, and Mike d’Abo, an English singer and member of 1960s musical group Manfred Mann. She has an older brother, as well as two half-brothers and one half-sister: elder brother Ben, younger half-brother Bruno, and younger sibling twins Ella and Louis (born July 2007) on her father’s side. Olivia and Ben both attended high school in the United States at Los Feliz Hills School (formerly “The Apple School”) in Los Angeles, and d’Abo attended Pacoima Junior High School in Pacoima, Los Angeles.
She was formerly engaged to singer Julian Lennon. She was married to songwriter, keyboardist, film composer, and music producer Patrick Leonard.