Quentin Beck is a former employee at Stark Industries who became embittered as Tony Stark disregarded his entire life's work, resulting in Beck losing his job.
Real Name: Quentin Beck
Portrayed by: Jake Gyllenhaal
1. Spider-Man: Far From Home
Seeking his redemption, Beck had joined forces with other former Stark employees to create a new superhero named Mysterio, using their Combat Drones and his own hologram technology to create an illusion of his own superpowers, as well as multiple attacks from the fictional Elementals.
Knowing that he needed to create world threatening illusions to sell his lies, Mysterio had then gained the trust of Nick Fury in order to get closer to Spider-Man, as he knew that Stark had gifted Spider-Man with access to the technology he needed. However, as Spider-Man discovered Mysterio's deception, he defeated Beck in London, as Beck's overconfidence resulted with his own demise.
However, in the moments before his death, Beck had managed to record his messages for J. Jonah Jameson, exposing Spider-Man's true identity and framing him for all of the Elemental attacks.