WARNING: Spoilers ahead for Avengers: Infinity War.
Fans had been speculating that Carol Danvers would make an unannounced appearance in the film, perhaps in a post-credits sequence.
Ultimately, Captain Marvel did have a part to play in Infinity War – but Larson herself was not seen.
In a post-credits sequence, Samuel L Jackson’s Nick Fury was shocked to witness The Snap taking place – as a result of Thanos collecting all of the Infinity Stones, giving him the power to wipe out half of humanity.
Fury collected a mysterious communication device and hurriedly sent out some kind of message, which the screen said was “SENDING”.
When it went through, Captain Marvel’s recognisable logo showed up on its screen – indicating that she has been made aware of what is going on.
What exactly that means in terms of where she had been in the run-up to that moment, and why she hasn’t been involved at all in the MCU thus far, remains to be seen.
Larson was at the Infinity War premiere and tweeted her excitement afterwards, helping to set up the hype for its release.
“WE SAW INFINITY WAR AND KNOW EVERYTHING THAT HAPPENS IN IT OMG,” she exclaimed.
Filming is ongoing for the project, with Kevin Feige revealing on the red carpet last week that the cast had been allowed to finish early for the day so they could attend the premiere.
Avengers: Infinity War has had huge success so far, amassing the top-grossing opening weekend ever in both the US and worldwide.
Ant-Man and the Wasp is the next entry in the saga, due for release in the summer (and set before the events of Infinity War), while Captain Marvel – also set beforehand – arrives in the spring.
Avengers: Infinity War is out now.