First appearing in Marvel Comics in the 1960s, Natasha Romanoff, a.k.a. Black Widow, was introduced to movie audiences in Iron Man 2 (2010). Her character has grown in popularity with subsequent Marvel films, and fans have been vocal about wanting to see Black Widow in a titular role. Romanoff has potent appeal: a strong female character who is not defined by her looks or her romantic relationships, with the skill set of a veteran spy first for the KGB, then for S.H.I.E.L.D. This collection of new essays is the first to examine Black Widow and her development, from Cold War era comics to the Marvel Cinematic Universe.