Machine Gun Kelly and Conor McGregor were involved in an altercation on the red carpet at the MTV Video Music Awards on Sunday night (12.09.21)

A source told TMZ that Conor put his hand out to introduce himself to Kelly, but the star's team allegedly pushed him away.

Another source told the gossip website that Conor had asked the 'Rap Devil' hitmaker for a photo, but it was reported his request was denied.

Other footage showed the UFC star - who had some of his beverage spilled in the scuffle - later throwing what was left of his drink on the red carpet.

Conor was walking the carpet with a cane because the fighter is recovering from a broken tibia, which he suffered during his last UFC match in July against Dustin Poirier.

He appeared to have abandoned his walking aid during part of the altercation, but he was later handed it back when things settled down.

Conor was at the spectacle with his wife Dee Devlin.

Kelly later had some photographs with his girlfriend Megan on the red carpet.

And during the ceremony, the 'Roll the Windows Up' star took to the stage to perform with Blink-182 drummer Travis Barker.