Alexander Draper "Alex" Wolff (born November 1, 1997) is an American actor, musician, and composer. He first gained recognition for starring alongside his older brother Nat in the Nickelodeon musical comedy television series The Naked Brothers Band (2007–09), which was created by the boys' mother Polly Draper. Wolff and his brother released two soundtrack albums for the series, The Naked Brothers Band and I Don't Want to Go to School, which were co-produced by their father Michael Wolff. Subsequent to the conclusion of the Nickelodeon series, Wolff and his older brother also formed a duo called Nat & Alex Wolff, and they released the album Black Sheep in 2011. Later on, Wolff began focusing more on acting roles in movies. He portrayed Dzhokhar Tsarnaev in Patriots Day (2016) and John "Derf" Backderf in My Friend Dahmer (2017).
Wolff was born in Manhattan, New York, to actress and writer Polly Draper and jazz pianist Michael Wolff. He is the younger brother of actor and musician Nat Wolff. His father is Jewish and mother is Christian. Wolff is a maternal grandson of venture capitalist and civic leader William Henry Draper III, a nephew of venture capitalist Tim Draper, a cousin of actress Jesse Draper, and a great-grandson of banker and diplomat William Henry Draper, Jr.