Dermot O’Leary has revealed his wife Dee Koppang’s due date as the couple prepare to welcome their first child together later this year.The couple, who have been married for eight years, announced that they were expecting in February, and former X Factor host Dermot has now revealed when their baby will arrive. Dermot, 46, was speaking on Zoe Ball’s Radio Two Breakfast Show on Friday when the topic came up while he was chatting to Elbow singer Guy Garvey.