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GREEN DAY; Mike Dirnt, Billie Joe Armstrong, Tre Cool
American rock band Green Day made a surprise appearance at Petco Park on Friday afternoon as Comic-Con festivities took over the Gaslamp Quarter.
The band’s frontman, Billie Joe Armstrong, was seen at Gallagher Square playing the band’s song “Basket Case”. Armstrong also threw ice cream and T-shirts to an excited crowd from atop an ice cream truck emblazoned with the name of the upcoming comedy “Nimrods”.
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The surprise show came ahead of the release of the film based on the band’s early days. “Nimrods” is slated to come out Aug. 14 in the U.S. is written and directed by Lee Kirk and stars actor Mason Thames.
Actors Thames and Jenna Fischer, who is also in “Nimrods”, were seen at the stage. Fischer is known for playing Pam Beesly in “The Office”.
Green Day frontman Billie Joe Armstrong surprised attendees at <a href="https://x.com/hashtag/SDCC?src=hash&ref_src=twsrc%5Etfw” rel=”nofollow noopener” target=”_blank”>#SDCC with a surprise performance outside Petco Park!
His new film #NIMRODS is in theaters August 14. Get tickets on Fandango – https://t.co/cmsNq3Q5Vspic.twitter.com/BMIwnnSWIh
— Fandango (@Fandango) July 24, 2026
The line for the Nimrods ice cream truck inside Petco Park is about 120 people deep. Entrances on 7th and on J streets are open. #sdccpic.twitter.com/GPvu7pS93x
— SDCC Unofficial Blog (@SD_Comic_Con) July 24, 2026
Mason Thames and Jenna Fisher watch on as Green Day gives a surprise performance at #SDCC for their movie #Nimrodspic.twitter.com/4XdtVoKj8S
— TheWrap (@TheWrap) July 24, 2026
