Troian Avery Bellisario (born October 28, 1985) is an American actress. She currently stars as Spencer Hastings in the ABC Family series Pretty Little Liars.
Troian Avery Bellisario was born and raised in Los Angeles. Her parents are producers Donald P. Bellisario and Deborah Pratt. Donald P. Bellisario created Magnum, P.I., Quantum Leap, and NCIS, among other TV series. She has a younger brother, Nick Bellisario, three half-sisters, two half-brothers and is a stepsister of actor Sean Murray, and producer Chad W. Murray.