Shannon Ashley Garcia "Shay" Mitchell (born April 10, 1987) is a Canadian model and actress. She is best known for portraying Emily Fields in the ABC Family series Pretty Little Liars, and Peach Salinger in the TV series You. Shannon Ashley Garcia "Shay" Mitchell (born April 10, 1987) is a Canadian model and actress. She is best known for portraying Emily Fields in the ABC Family series Pretty Little Liars, and Peach Salinger in the TV series You.