Besides the fact that Gyllenhaal will now be treating his devoted fans to photos of his everyday life, the post seems to confirm something that's been the subject of heated speculation for months - his reported role in the upcoming follow-up to Marvel's "Spider-Man: Homecoming".
Well, Jake Gyllenhaal has just joined Instagram to make his big baddie reveal. In the video he can be seen reading a classic Spider-Man comic with a cover that reads, "The Return of the Man Called Mysterio".
It's a amusing way to reveal his role - made funnier by the caption: 'I just realised I'm not playing Spider-Man, ' which is a nice nod to the time Gyllenhaal nearly replaced Tobey Maguire in Spider-Man 2 (Maguire injured his back before the shoot, Gyllenhaal trained to step into the role, but Maguire recovered in time).
The role will be the actor's first major part in a superhero blockbuster film. "That's what it feels like when you're working". The character was introduced in The Amazing Spider-Man #13 back in June 1964.
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George H.W. and Barbara Bush's daughter, Robin, died of cancer in 1953. Towards the end of his eulogy, Bush became visibly emotional.
Mysterio is a special effects expert who commits crimes and fights Spider-Man using elaborate illusions, according to The Hollywood Reporter.
It's good fun, and a sign that we can expect the marketing for Spider-Man: Far From Home to start ramping up.
The film will see Tom Holland return to play Spider-Man and Zendaya as Michelle Jones.
Spider-Man: Far From Home is a sequel to 2017's Spider-Man: Homecoming and is due to be released in July 2019.