Machine Gun Kelly has publicly shut down rumours suggesting he is dating Sydney Sweeney.

During an appearance on Watch What Happens Live with Andy Cohen on Sunday night, the star, also known as MGK, was asked to comment on a photo he took with the Euphoria actress, along with other friends, back in May.

"MGK, Kyle P. wants to know if there's any truth to the rumour that you and Sydney Sweeney were more than just friends," host Andy read from a card.

In response, Kelly looked directly at the camera and issued a candid message.

"Kyle P, shut up, dude," he declared.

MGK, real name Colson Baker, and Sydney have known each other for some time, having co-starred in his 2021 directorial debut, Downfalls High.

The Cliché hitmaker is believed to be single, having split from Megan Fox last December. The former couple welcomed a daughter named Saga in March.

Meanwhile, Sydney, 27, reportedly called off her engagement to producer Jonathan Davino in May.

Elsewhere in the chat, MGK stated that he doesn't like to think about ageing.

"It's a weird thing, dude, I don't know if it exists," the 35-year-old pondered. "I just don't know many facts about my life, so I'm starting to just be like, like, my skin, if it just rips open, it heals really quick, there's just things where I'm starting to be, like, 'Who's my dad?' You know?"

Andy then queried whether MGK considers himself to be otherworldly, and in return, he recalled how he once asked his mother whether there was any "period of time when (she) went missing".

"She told me she felt like she got abducted at one point, so I was just, like," he shrugged.