Shrewsbury Big Brother housemate Kris Donnelly might have to prove his romance with model Sophie Reade is real in a special test.

Producers of the show, who suspect their relationship is fake, are said to be planning to lock the 24-year-old heart-throb in a room with Sophie for 48 hours.

As part of the test it is thought the pair will have to answer questions about each other and listen to conversations they have had with other contestants, including Kris’s fellow Shropshire housemate Freddie Fisher.

Meanwhile, tonight Big Brother housemates will be called to nominate who should be evicted in a special live show.

Host Davina McCall will broadcast directly from the studios to spring the surprise. Following clips of housemates’ highlights on Channel 4, Big Brother will announce to the house that each housemate will be called, one by one, into the diary room to give their nominations live on TV.

Each housemate will be given a strict amount of time to name the two housemates they wish to nominate.

Only nominations given within this time frame, with full and frank reasons, will count. Housemates will be gathered on the sofas to hear the results of the nominations later.

The highlights will be shown from 9pm and the live nominations will air at 10.55pm.

The public vote will open at 10am tomorrow.

Meanwhile, it has emerged that Kris appeared in a television advert while living in New Zealand.

The advert sees Kris leaving his girlfriend and son because he does not want to date a woman with a child.

The tag line reads: “Making bad behaviour look good.”