The 30-year-old actress will reprise her role of Black Widow in the superhero-action film, which is the sequel to 2012 movie "The Avengers".
The mysterious pair of weapons unleashed by Johansson's character has sparked speculations that the upcoming film has a possible "Star Wars" connection in the form of a tribute.
"Avengers: Age of Ultron" also stars Robert Downey Jr, who returns as Iron Man, along with Chris Hemsworth as Thor, Mark Ruffalo as Hulk and Chris Evans as Captain America.
"Avengers: Age of Ultron" is all set to hit Indian theatres on April 24, 2015, a week before it releases in the US.
