Green Day fans got way more than they bargained for when they showed up to the rock band’s movie casting call … ’cause TMZ has learned they walked into a full-blown free concert!

TMZ’s got the deets — hundreds of fans flocked to the Hollywood Palladium Tuesday after the casting call went out for a New Year’s Eve performance scene for Green Day’s upcoming flick, “New Year’s Rev” … and you can see from the clip, the line literally wrapped around the block.

Sources tell us the band rocked out for hours, playing all their biggest hits while cameras rolled — meaning these lucky superfans scored a free Green Day concert!

The movie, produced by Live Nation Entertainment, is a coming-of-age story about 3 pals — played by Mason Thames, Kyler Coffman, and Ryan Foust — who chase their rock star dreams all the way to L.A., mistakenly thinking their band is opening for Green Day on New Year’s Eve.

Jake Paul and Jutta Leerdam made their first public appearance as an engaged couple on Wednesday … and they put the Olympic speed skater’s massive new accessory on full display.

The lovebirds hit the premiere for their new Max Original show, “Paul American,” just now … electing for all-black outfits after rocking white ensembles for the proposal in Saint Lucia.

Jake and Jutta also did some prom-esque poses … proving they don’t mind getting all mushy for the cameras (something they’re used to at this point).

TMZ Sports spoke with the Paul Bros about the big show … and they admitted it took some convincing to get their partners on board, but they ultimately agreed to be involved — and they’re thrilled to show the world how special they are.

The big event was held at Tempo by Hilton New York Times Square … and of course, the whole family was there to celebrate the release.

Greg Paul showed up with Hawkwind Kelly as Pam Stepnick arrived solo … and Logan rolled through with his fiancée, Nina Agdal.

Bella Hadid may have had a falling out with one of her longtime friends at Paris Fashion Week this month … ’cause eyewitnesses say the two got into an intense verbal argument — and, they didn’t leave on speaking terms.

The argument allegedly went down at a Yves Saint Laurent after-party on Tuesday, March 11 … and, eyewitnesses tell TMZ Bella was repeatedly asking Fai Khadra to leave her alone throughout the night.

We’re told Fai refused to do so and acted inappropriately toward her … verbally berating her and raising his hands over her in an aggressive manner.

If you don’t know Fai … he’s an artist and influencer with more than two million followers on Instagram. He’s a close personal friend to Hailey Bieber, Kendall and Kylie Jenner, too — but, despite speculation, he’s never been romantically involved with these ladies.