Ariana Grande has surprised staff at a city centre restaurant with free tickets to her show.

The pop superstar is in the city ahead of her massive gig at the SSE Hydro later tonight, and decided a trip to The Anchor Line was in order.

Waiting staff and chefs were stunned to see the 'Thank U, Next' star in the New-York Style Bistro - but that was not to be the end of the surprise.

READ MORE: Ariana Grande spotted in Glasgow city centre ahead of SSE Hydro gig

She asked staff to use a 'cute filter' on Snapchat as she posed for pictures and then offered the crew free guest-list tickets to tonight's show.

The restaurant on St Vincent Place couldn't contain their excitement, and shared the exchange on their Instagram.

They wrote: "What a sweet(ener) surprise! Ariana Grande in our bar and restaurant!😍.

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"Here she is with our staff last night after she asked them to use a “cute filter” on the snap 🥰!

READ MORE: Ariana Grande cancels VIP meet and greets ahead of Glasgow Hydro Show

"She was also kind enough to hook them up with guest-list tickets to her show🙈❤️!

"You’re always welcome at The Anchor Line Ariana! 🥰"

It comes after the singer was spotted in George Square yesterday by eagle-eyed fans after she touched down in the city.

She stopped to chat to fans and take selfies before she performs in front of thousands tonight.