Today is Sasha Pieterse's 19th birthday! The actress has been busy wreaking havoc in Rosewood starring as the backstabbing frenemy Alison DiLaurentis on Pretty Little Liars for the last five years and she has literally grown up right before our eyes.
Sasha has been acting since she was a little girl so in honor of Transformation Tuesday and her b-day, we decided to take a look at just how much her style has changed throughout the years.
Click through the gallery to see Sasha evolve from an adorable, budding fashionista into a full-blown style queen in 19 pics! Don't forget to leave her a birthday message in the comments below too!