Trivia

Overcame an eating disorder and self-harm addiction.

Her father served in the United States Marine Corps and was in the same platoon as Lee Harvey Oswald.

Father, Donald P. Bellisario, wrote the Quantum Leap (1989) episode, A Portrait for Troian - February 7, 1971 (1989), which aired in 1989, when Troian was four. Troian's mother, Deborah Pratt, played "Troian" in the episode.

Is the second youngest of nine children.

As a young girl, Troian's neighbors included, Mary-Kate Olsen, Ashley Olsen, and director Lesli Linka Glatter.

(December 10, 2016) Married her partner of 7 years Patrick J. Adams in Santa Barbara, California following a 2-year-long engagement.

Is step-sister of Sean Murray, who plays Agent Tim McGee on NCIS (2003), and has appeared in it several times as Sarah McGee, Tim McGee's sister, and Chad W. Murray.

Sister of Nicholas Bellisario (Nicholas Dante Bellisario). Half-sister of Michael Bellisario, David Bellisario and Julie B. Watson.

Very good friends with co-star Keegan Allen and Lucy Hale.

Troian's paternal grandfather, Albert Jethro Bellisario, was of Italian descent, while Troian's paternal grandmother, Dana Lapcevic, was of Serbian ancestry. On her mother's side, Troian is the granddaughter of Col. Bertram Roberson Pratt (from Mobile, Alabama) and Geraldine Bryant (from Baton Rouge, Louisiana). Troian's maternal grandparents were both from African-American or Creole (mixed African and European, including French) families.

Stepdaughter of Vivienne Bellisario.

Her best friend since they were at high school together is Lulu Brud.

Enjoys singing and dancing.