Troian is the daughter of Donald P. Bellasario and Deborah Pratt. She has one brother, Nicholas Dante Bellisario, and older half-brothers David and Michael Bellisario.
Troian is 5' 7" (1.7 m) tall.
Troian is one of 9 siblings. She only has one "full" sibling and the rest are half and step siblings.
Troian doesn't eat any meat except for fish.
Troian studied French for 7 years.
Troian attended the University of Southern California's School of Theatre. While there she graduated with a bachelor of fine arts in acting.
Troian very first acting role was on the show Quantum Leap that her father created.
Troian's on-screen debut was in the movie Last Rites,which was written and directed by her father.