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 was been nominated three times for the Teen Choice Awards.
In 2011 and 2012, she was nominated to the category Choice Summer TV Star: Female, for her role in Pretty Little Liars, having won it in 2012.
In 2013, she won in the category Choice TV Actress: Drama, again for her role in Pretty Little Liars
Troian has one sibling, Nicholas Bellisario, and three half-siblings Michael Bellisario,David Bellisario and Julie B. Watson.
Her father, Donald P. Bellisario, wrote an episode of TV series Quantum Leap named after her daughter (episode named A Portrait for Troian on December 13th, 1989). Her mother, Deborah Pratt, played the role of Troian in that episode.
Troian had an eating disorder and a self-harm addiction; both of which she has been able to get over.
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 (1988), which was written and directed by her father.
Troian: (on her struggles regarding appearances and the comparison with her Pretty Little Liars co-stars)Honestly, it's an ongoing struggle. Especially for a woman on a show that has the word 'pretty' in it! Sometimes I feel like I'm trying too hard, like I don't belong. I just look around at Lucy, Shay and Ashley and I'm just like, 'Why am I on this show?'
Troian: (on getting compliments on her beauty) Getting compliments is wonderful and everyone should feel beautiful in their own skin. But I get my hair and make up done professionally. For a job. That's not beauty. That's make up it's a curling iron and hairspray. What's beautiful is inside you. It's your creativity. It's your intelligence. Your empathy and your kindness to your fellow man
Troian: (her opinion on climate change) We are the polar bear - Not our grandchildren or their grandchildren. Climate change is happening now, to us.
Troian: (on her liking Paris) Merci à Paris- U r the craziest most beautiful home away from home. I will never forget you and I will run to come back. À bientôt mon amour
Troian: (on her character in Pretty Little Liars having an addiction) Portraying a character's addiction is a challenge. I'm grateful to the writers of Pretty Little Liars for helping take it on with respect and authenticity.
Troian: I think I am so far from perfect. In fact I don't know anyone who is, perfection is boring, flaws are what make human.
Troian: (on doing the noir themed episode Shadow Play of season 4 of Pretty Little Liars) There was a about it, a deliberateness, & a feeling that we were making something beautiful and different together!
Troian: (on doing the hair and makeup for the noir theme episode Shadow Play of season 4 of Pretty Little Liars) Usually we have about 1.5 hrs of hair and make up to look "normal. so I was happy to do that same time to look period.
Troian: I have a lot to be happy about and a lot more I want to do.
Troian: (on having been challenged to achieve since childhood) My high school was a private school where you went to an Ivy League. That's just what was expected of you and nothing less. So I grew up never being okay with a 'B' because a 'B' was not good enough.
Troian: (on having grown-up with fame around her) I've always known people in the spotlight and people who just grew up in LA and had nothing to do with the industry. It's not a glamorous thing to me. It's just a different type of business. I've seen friends go down the path of drugs or letting the spotlight go to their heads. I've witnessed that. It's not a very good option if you want to have a long career like I do and do a lot of different things.
Troian: I'm not a glamorous girl. I don't know how to do my hair. I'm very bad with makeup.
Troian: As an actor I really want to be challenged, and I thought that this was a story that needed to be told. It spoke to me not just as an actor, but also as a person.
Troian: I'm partial to slouchier, more free clothing. My icon is Patti Smith, so the more rips, the more punk, the more comfortable I feel.
Troian: (on preparing for her role in Lauren) You know, my father was in the military and one of the first things I said was that I need somebody who is military trained, who can teach me how to walk and salute like a soldier and who will not placate me, or be like, "that was really good for an actor!" I was like 'No Bullshit! I need to know when I'm looking bad and when it's wrong and when I'm doing it right'.
Troian: That's really what changed for me: learning how to juggle and learning how to be easier on myself. I'm like Spencer at this point in my life: I get stressed out really easily, and the first thing I have to do is not let myself go down that road.
Troian: (on her name) I've never met any other Troians. I've only been told of them. I came really close. One of my best friends in elementary school went to a different school. Her math teacher heard about my name, and she was going to name her kid that. I remember this whole week where I was freaking out that there was going to be another Troian in the world.
Troian: I was definitely a tomboy. My mother liked to dress me differently, but it was her loss when I came home with mud in my hair every day. I've always been more comfortable with guys, I don't know why. But I have always had one best girl friend, and no one gets closer than her.
Troian: I was also drawn to the story because it made me aware of an issue that I really had no idea about. I really believe that when taking on a new role, you, as an actor are expanding yourself. You are learning more about another human being's experience in the world and with Lauren, my eyes were opened to a very different world, and also a very tragic one.
Troian: I absolutely looking forward to having my own family, but personally, I have a lot of things to work out before I get there. Right now I'm in this blessed period of having a family that I choose to run with in this kind of pack of friends.
Troian: Not only do I want to be an actress, I want to be one on my own and be good at it on my own.
Troian: (on nepotism and on wanting to get success on her own) I had the opportunities and I took them for the experience. I was always aware of the nepotism. I didn't feel respect on the set. I didn't focus on what I was doing. I focused on, 'These people think I'm only here for one reason, because of my dad.' I didn't like it.
Troian: Everybody's really been positive about the show, and I'm really grateful and want people to enjoy it. But I don't know how much I'm really into celebrating. What you have to love is the work, not the success.
Troian: (on handling criticism) My dad told me that night after seeing me in The Crucible that I had done a great job, but the next day one of my favorite teachers told me I had ruined the play for her - that in so many ways I could have gone further. So it's like, I can't attach myself to a negative position, or a positive position. I just take them in.