Troian Bellisario is an American actress best known for her starring role as Spencer Hastings, a straight-A student and overachiever, in the teen drama mystery series Pretty Little Liars.
Bellisario previously had a recurring role on the television series NCIS and guest starring parts on First Monday, JAG and Quantum Leap, among others.
She was seen in the theatrical motion picture Last Rites, as well as the independent films Peep World, Consent and Billboard Dad.
On stage, she appeared in Farragut North and Equivocation at the Geffen Playhouse in Los Angeles. With The Casitas Group, a theatre company of which she is a founding member, Bellisario appeared in an exclusive engagement of Martin McDonagh's The Pillowman, as well as a Sam Shepard double feature: Fool for Love and True West.
She has also performed in university theatre productions of Rosencrantz and Guildenstern are Dead, The Suicide, All's Well That Ends Well and Machinal.
Bellisario lives in Los Angeles, where she graduated from the University of Southern California's School of Theatre, earning a bachelor of fine arts in acting.
She is the daughter of television producer Donald Bellisario and actress Deborah Pratt and the half-sister of Michael Bellisario. Actor Sean Murray and producer Chad W. Murray are her stepbrothers.
Troian enjoys dance, writing and playing the guitar.