Professor Green has proposed to his girlfriend, Made In Chelsea star Millie Mackintosh.

Mackintosh broke the news of their engagement on her Twitter and Instagram accounts.

She posted a photo of her ring, along with the message: "If I could scream loud enough for the whole world to hear I would."

The 29-year-old rapper also mentioned the news with a tweet to his followers, joking that people needed to tell other celebrities that he is off the market.

He wrote: "Happy days. Someone's gonna have to break the news to Jessica Alba and Eva Mendez."

Professor Green, whose real name is Stephen Manderson, and Mackintosh began dating in December 2011.