Harry Styles concert at United Center Thursday rescheduled 'out of an abundance of caution'

Fans of Harry Styles will have to wait two nights or more to see their idol in concert in Chicago.

Thursday night’s concert, the first of six scheduled at the United Center between this weekend and next, is being rescheduled for Monday night "out of an abundance of caution" due to "band/crew illness," according to a tweet from the United Center on Thursday afternoon. A spokesperson for Sony Music, Styles’ record label, said the singer was not affected.

Saturday night’s show will go on as scheduled, followed by the remaining concerts Oct. 9, 10 (rescheduled from Thursday), 13, 14 and 15. All shows are sold out.

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All tickets for Thursday’s postponed show will be honored on Monday night; Ticketmaster is notifying those affected by the date change.

By Wednesday, diehard fans had already staked their place in line outside the arena — some who had arrived more than 48 hours in advance by that point — to obtain a coveted GA "pit" wristband for Thursday’s show.

There was disappointment among fans.

"I’m pretty sure we’re going to have a meltdown in a minute," one woman said.

The concert was supposed to be Olivia Kitzman’s sweet 16 birthday gift.

"I don’t know if I’m gonna be allowed to come back because I have a tournament and I already missed some practices," said Kitzman.

Fans traveled from all over the country.

With 38 million followers on Twitter, Styles is revered as one of the top pop stars of today. He’s had more than 40 sold out concerts this year alone.

"All he wants is kindness in the world, so why wouldn’t I wanna support someone who does that," a fan said.

Despite the setback, die-hard fans are determined to make the most of it, whether that's taking part in photo ops or simply waiting for Styles to take the stage.

"Oh, it's serious. We’re changing our flights, we have to get a new hotel, we’re not playing. I’m not leaving until I see Harry Styles," said one Floridian.

The North American leg of Styles’ Love on Tour road trek kicked off Aug. 15 in Toronto.