The Avengers is a 2012 superhero film based on the Marvel Comics superhero team of the same name. Scarlett Johansson portrays Natasha Romanoff, also known as Black Widow, a highly skilled spy and assassin. The film follows the Avengers as they come together to stop Loki, the brother of Thor, from taking over the world. With its action-packed sequences and witty dialogue, The Avengers became a box office success and solidified Johansson's role as a key member of the Marvel Cinematic Universe.