The girlfriend of former Celtic starlet Theo Archibald has revealed shocking messages she claims he sent her mocking autism and admitting to cheating on her.

Jennifer Lewis publicly shared the series of messages apparently exchanged between the pair on her Twitter page, which show the Scotland U19s star poking fun at autism and boasting about sleeping around.

She tweeted screenshots of the messages with the caption: "Found out my boyfriend of 2 and a half years had been cheating on me for 8 months footballers eh".

Jennifer and Theo
Jennifer Lewis posted the shocking exchange on social media
Jennifer Lewis posted the shocking exchange on social media

In the Snapchat messages, Lewis quizzed Archibald about flings he allegedly had while they were in a relationship.

When asked who he slept with, the young footie star replied: “U asked who she was, I said she was autistic hahaha.”

Archibald, who now plays for English Championship side Brentford F.C, then goes on to discuss his affairs and in one foul-mouthed exchange admits: “Yea I f****d her too.”

He also claims he slept with a female he met in the Czech Republic during a trip with Scotland's U19s team earlier this year.

“She was the person that showed us about etc. But obv she had a liking to your boy so found me and messaged me on FB", Archibald gloats.

In the next message, he then goes on to boast about a fling he had in London.

Brentford F.C confirmed that the club has launched an internal investigation into the matter.

Archibald, 19, came though the youth ranks at Celtic and signed a three-year deal with Brentford in May this year.

A previous headline of this article suggested that Theo Archibald mocked Jennifer Lewis' autism. We would like to make clear that this reference was incorrect and Theo's mocking of autism was in fact about someone else.