Ariana Grande and Nicki Minaj have treated fans to a live duet.

The two acts performed separate sets at the opening of Las Vegas' T-Mobile Arena on Thursday (April 7).

However, they conjoined during the night to run through their collaboration 'Get On Your Knees'.

The song featured on Minaj's 2014 album 'The Pinkprint'.

After the show, the 'Problem' star uploaded a photo of the pair on stage.

She added: "Thank you Vegas & thank you @nickiminaj I love you @tmobilearena."

Minaj meanwhile will feature on Grande's upcoming new album 'Dangerous Woman'.

The record is set to land on May 20.

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Watch a clip of the collaboration below: