Zachary David Alexander Efron (; born October 18, 1987) is an American actor and singer. He began acting professionally in the early 2000s and rose to prominence in the late 2000s for his leading role as Troy Bolton in the High School Musical trilogy (2006–2008). During this time, he also starred in the musical film Hairspray (2007) and the comedy film 17 Again (2009). Efron has since starred in the films New Year's Eve (2011), The Lucky One (2012), The Paperboy (2012), Neighbors (2014), Dirty Grandpa (2016), Baywatch (2017), The Greatest Showman (2017), Extremely Wicked, Shockingly Evil and Vile (2019), and Scoob! (2020).
He is also known as Zachary David Alexander "Zac" Efron, Zachary Ian Alexander Efron and Zachary Efron.