Each day they will face the Honesty Box software and be asked probing questions about their feelings.
If it detects deception, the Box could impact their newly formed relationship and the prize fund.
GroupM Motion Entertainment is co-producing.
Vicky Pattison (left) and Lucinda LightLia Toby/Getty Images / Channel 4
Channel 4 programs boss Ian Katz unveiled the show at the networksEdinburghTV Festival dinner.
He will address the festival Thursday as the channel attempts to bounce back from a difficult financial year.
