The names of their two sons are yet to be revealed.
Speaking about becoming a mum to twins, Liz previously said: “I felt every single emotion under the sun. First, there’s double the world.”
“I thought about things like breastfeeding, how is that possible with two? How do you pick up two babies at the same time?
“I felt all of this in the space of 30 seconds. Kelvin was saying it’s a miracle, and I was thinking ‘How are we going to do this?’