Big Brother reject Mario Marconi is making a surprise return to the house - to propose to girlfriend Lisa.

The former housemate was spotted purchasing a wedding ring and is planning on sneaking back into the house to pop the question on Sunday.

But housemates will have to wait until the weekend to see Lisa’s answer.

I do: Mario picks out the perfect ring for a surprise proposal planned for Sunday

After being evicted, Mario, 42, hinted that he planned to marry Lisa after the show, but it looks as though he can't wait.

Sources told The Sun: 'Mario is really excited about getting to propose to Lisa.

'He has bought a ring and can’t wait to see her again.'

The couple met three years ago when she bought a crystal ball from him on eBay.

And this isn't the first time Mario has paid a visit to a jewellery story.

He previously pawned his Rolex to buy Lisa a boob job.

In the bag: Mario walks out with his purchase ahead of the big day.

Mario was evicted in week 5 after going head to head with Rebecca Shiner and has admitted he is missing his girlfriend.

Lisa is up for eviction this week alongside Nicole Cammack and Sara Folino, but bookies have given overwhelming odds for Rex's 19-year-old girlfriend to be evicted.

Mario and Lisa enter the house together, but soon they were pretending to have just met