Black Widow is the name of several fictional characters appearing in American comic books published by Marvel Comics. Most of these versions exist in Marvel's main shared universe, known as the Marvel Universe.
The most notable characters who have assumed the mantle of Black Widow over the years are Claire Voyant, Natasha Romanova, and Yelena Belova; as well as some alternative versions. The character has been associated with several superhero teams such as the Avengers, the Defenders, the Champions, S.H.I.E.L.D., and the Thunderbolts.