It wasn't Tom Holland who accidentally leaked precious secrets about an upcoming "Spider-Man" movie, but the 25-year-old actor did his part to hype the franchise's third installment before the official teaser dropped on Monday, following an alleged leak the day prior.<br /><br />Taking to Instagram stories, Holland warned, "You ain't ready!"<br /><br />Soon enough, Marvel dropped the official teaser-trailer for "Spider-Man: No Way Home," which picks up right after "Spider-Man: Far from Home's" cliffhanger, where Jake Gyllenhaal's villainous Mysterio unmasks Peter Parker as Spider-Man and wrongfully accuses him of his murder.<br />MORE: Tom Holland hypes up next 'Spider-Man' film as 'most ambitious standalone superhero movie ever made'<br /><br />The situation weaves a tangled web for Peter, who's grappling with losing his secret identity while trying to prove his innocence to the world, which dubs him "public enemy #1."<br /><br />Desperate, Peter seeks out the help of Benedict Cumberbatch's Doctor Strange and asks if there's a spell to make everyone forget he's Spider-Man.<br />MORE: Tom Holland tries and fails to quiz fans about the Marvel Cinematic Universe<br /><br />Unfortunately, the spell goes haywire and sends the world plunging into chaos. Alternate multiverse realities begin to crash into one another, bringing back familiar faces from Spider-Man's past, including Jamie Foxx's Electro and Alfred Molina's Doctor Octopus.<br /><br />In addition, we can hear Willem Dafoe's chilling Green Goblin laugh.<br />Editor's Picks<br /><br /> 1<br /> Tom Holland challenges Jake Gyllenhaal, Ryan Reynolds to viral handstand challenge<br /> April 3, 2020<br /> 2<br /> Tom Holland hypes up next 'Spider-Man' film as 'most ambitious standalone superhero movie ever made'<br /> February 5, 2021<br /> 3<br /> Tom Holland tries and fails to quiz fans about the Marvel Cinematic Universe<br /> April 30, 2020<br /><br />The trailer ends with Strange's ominous warning: "Be careful what you wish for, Parker."<br />PHOTO: Jacob Batalon, Tom Holland and Zendaya star in Columbia Pictures' "Spider-Man: No Way Home."<br />Matt Kennedy/Columbia Pictures/Marvel Studios<br />Jacob Batalon, Tom Holland and Zendaya star in Columbia Pictures' "Spider-Man: No Way Home."<br /><br />While the teaser features villains from past Spider-Man incarnations, it doesn't confirm if original Spider-Man Tobey Maguire or successor Andrew Garfield will also appear in the MCU as rumored. Maguire appeared in three Spider-Man films in the late 90s and early aughts, while Garfield took over the mantle in 2012 and 2014.<br /><br />"Spider-Man: No Way Home" is a co-production of Sony Pictures and Marvel Studios. It swings into theaters Dec. 17.<br /><br />Marvel Studios is owned by Disney, the parent company of ABC News.