Harry Styles embarrasses sister on a date at One Direction concert

In fact, he even warned his big sis to behave herself in front of him!

Dozens of excited fans lined up outside the venue hours before the show started to see band members Harry Styles, Niall Horan, Liam Payne and Louis Tomlinson in person.

Ch-ch-check out Harry & Co.’s hilarious concert interruption (below)!!!

The One Direction boys were opening the first of six nights in the massive venue, as they kicked off their On The Road Again United Kingdom tour and things got off to a flying start, as they performed tunes such as Drag Me Down for a VERY enthusiastic and loud crowd.

Oh and nice shirt, Harry.

“Distracted”: Harry, 21, told the buzzing crowd, “My sister is on a date”. Can you imagine your brother, being the biggest star in the world, calling you out on a date?!

The concert came shortly before the popular boy band made the announcement of its fifth album, titled “Made in the AM”.

Harry stared down at them with a faux serious face and said, “Right”.

Siblings always know how to embarrass you at the worst possible moments and Hazza was no different.