Fans going to see Captain Marvel at the AMC Clifton Commons 16 movie theater in Clifton, New Jersey, on Saturday night were surprised with a visit from Larson herself.
Larson greeted excited fans before the screening.
"I just heard that I was on the cups and popcorn and I wanted to see for myself," Larson said to the New Jersey moviegoers in the video. "Thank you so much for coming. You guys are so awesome to come opening weekend."
If that wasn't cool enough, Larson also worked the concessions stand, serving popcorn and soda to fans.
Captain Marvel is already skyrocketing up the box office charts after its first full day in theaters on Friday. The Marvel superhero film earned an estimated $61.4 million domestically, , including the $20.7 million preview day on Thursday.
That's pretty impressive, considering Larson wasn't even at all those screenings.
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Originally published March 10, 2019 at 7:30 a.m. PT.
Update 2:02 p.m. PT: Added more photos.