Yelena Belova (Russian: Еле́на Бело́ва) is a fictional character appearing in American comic books published by Marvel Comics. Created by writer Devin Grayson and artist J.G. Jones, the character appeared as a sketch in Marvel Knights: Wave 2 Sketchbook #1 (January 1998) before debuting a year later in the second volume of Inhumans #5 (January 1999) by writer Paul Jenkins and artist Jae Lee.
Florence Pugh portrays the character in the Marvel cinematic universe (MCU). Pugh's version is depicted as the adopted sister of Natasha Romanoff / Black Widow.