Jake Gyllenhaal joined Instagram and used his first post on the social media site to poke fun at his upcoming villainous role in Marvel's Spider-Man: Far From Home.

Gyllenhaal is set to portray classic Spider-Man foe Mysterio in the sequel to Spider-Man: Homecoming. The character is a special effects expert who uses his skills to commit crimes by creating illusions.

The actor posted on his new Instagram a video of himself reading a Spider-Man comic that features Mysterio. Gyllenhaal, after putting the comic book down, looks stunned before he almost drops an f-bomb.

"I just realized I'm not playing Spider-Man," Gyllenhaal captioned the comedic clip.

Spider-Man: Far From Home is set to arrive in theaters on July 5. Tom Holland is returning to portray the wall-crawler alongside returning stars Michael Keaton, Zendaya and Marisa Tomei, among others.

Gyllenhaal is also set to re-unite with his Nightcrawler co-star Rene Russo in Netflix thriller Velvet Buzzsaw. The film takes place in Los Angeles' contemporary art scene.