WARNING: The following article contains spoilers for Sony's Spider-Man: Into the Spider-Verse, in theaters now.
If you haven't already heard, critics and audiences -- in a rare occurrence -- seem to completely agree that Spider-Man: Into the Spider-Verse is one of the greatest Spider-Man stories ever told and one of the rare adaptations that focus on Miles Morales instead of Peter Parker. It presents the world of Spider-Man in playful ways and respects its source material as well as the creative minds that shaped it.
One of the ways with which it does that is by making sure that none of the little surprises that litter the film are wasted on cheap laughs or pure fan service. Each one blends into the film or serves a purpose, which is one of the reasons why it's easy to miss some of the vocal cameos we're about to run down.
Chris Pine as Peter Parker
In the trailer, the voice of Peter Parker is that of Jake Johnson, who plays Peter B. Parker. He's the older, world-weary Spider-Man that is pulled into Miles Morales' universe, eventually taking on the responsibility of mentoring Miles (sort of) when the original Spidey meets his grim end at the hands of Kingpin. We don't see the original for long -- just enough to get a quick impression of what he's like as a superhero so we can compare and contrast Spider-Man in his prime to the slightly more cynical one that ends up mentoring the up and comer.
When we hear him speak, it quickly becomes clear that the original Spider-Man's voice is notably different from the older, less blonde Peter that appears later on. That's because the voice we hear is that of Chris Pine, who brings the same nobility, wit and strength to the short-lived character that he brought to the last major superhero film he appeared in: Wonder Woman.
Kathryn Hahn as Olivia Octavius
Doc Ock appears in the film, only not as many might have expected. In Miles' universe, Doc Ock is the alter ego of a scientist named Olivia Octavius, who works for Alchemax under Wilson Fisk, the film's main antagonist. Liv is the brains behind Kingpin's entire interdimensional project, and evidently the only real protection Alchemax has from intruders like Spider-Man.
A character like Doc Ock in this particular film needs to be menacing but fun. Fitting that role perfectly is Kathryn Hahn, who brings levity and just a touch of insanity to Olivia. Her appearance is a little more than just a cameo, but it's surprising enough to be included in this list.