Alexander Draper Wolff (born November 1, 1997), known by his nickname and professionally as Alex Wolff, is an American actor, musician, and singer-songwriter. He first gained recognition for starring alongside his older brother, Nat, in the Nickelodeon musical comedy series The Naked Brothers Band (2007–2009), created by his mother, Polly Draper. Wolff's father, Michael Wolff, co-produced the series' soundtrack albums The Naked Brothers Band (2007) and I Don't Want to Go to School (2008), which placed on the Billboard 200 charts.

After the Nickelodeon series ended, Wolff and his brother formed a music duo called Nat & Alex Wolff. They released the albums Black Sheep (2011), Public Places (2016) and Table for Two(2023). He focused his career on film roles, portraying Dzhokhar Tsarnaev in Patriots Day (2016) and John "Derf" Backderf in My Friend Dahmer (2017). Wolff made his directorial debut with the drama film The Cat and the Moon (2019). His other acting roles include My Big Fat Greek Wedding 2 (2016), Jumanji: Welcome to the Jungle (2017), Hereditary (2018), Pig (2021), Old (2021), and A Quiet Place: Day One (2024).