The 32 year old announced the birth of Pearl and Louie in September 2015, telling HELLO! magazine how she had to have an emergency C-section after developing an infection.
'I was completely out of it, partly down to the medication and temperature and partly because I?d had no sleep,' she explained.
'I heard a cry and I came around. I said, "What is it?", Phil said "It?s a girl," and I was really emotional. Then I heard another cry and asked, "What is it?"
'He said it was a boy. It was amazing.'
Becoming a mum of two can be stressful, but luckily Kellie has the support of her friend and former co-star Denise Van Outen, who is mum to Betsy, five.
'Denise has Betsy and she's been trying to give me baby clothes and tips ahead of the birth,' Kellie said. 'It's great to have friends who are also mums and can put your mind at rest.'