WATCH: Tom Holland ‘accidentally’ reveals confidential ‘Infinity War’ poster

TOM HOLLAND SHOWING A CONFIDENTIAL INFINITY WAR POSTER THAT MARK RUFFALO SENT HIM IS THE BEST THING I’VE EVER SEEN pic.twitter.com/tYVdOyMxiz

— sara (@JensenAcklesGod) November 28, 2017

Despite his boyish charm, “Spiderman” star Tom Holland is notorious for his inability to keep upcoming Marvel plots a secret.

The 21-year-old was at it again—this time, revealing a supposed confidential “Avengers: Infinity War” poster to his Instagram followers.

As relayed by Twitter user @JensenAcklesGod, the clip featured an Instagram live clip of Holland unboxing a package from his good friend and “Avenger” co-star Mark Ruffalo.

The young actor appeared animated after looking at the slick poster and immediately shared it with his viewers.

However, his excitement turned into panic, as Holland appeared to have missed a second note, which specifically said “Confidential do not share.”

“Hi Tom I’m so excited to be working with you on “Infinity War” and I though you’d like to be the first to see the poster from the movie,” he read.

Marvel officially released the teaser poster to the public, an hour after Holland’s gaffe.

Regarded as the biggest superhero movie to date, “Avengers: Infinity War” is  slated for a May 4, 2018, release. A full trailer for the highly anticipated superhero mash-up will be released on Nov. 29. /ra