Carly Cole said she will not try to be "the perfect mum" second time round after giving birth to son Harrison.
The wife of Liverpool footballer Joe Cole gave birth last month and said she loves being a mum to two-and-a-half year old Ruby and the new arrival - already known as Harry.
She told Hello! Magazine: "Sometimes I wake up and I still can't quite believe it, that I have these two beautiful children."
Cole, who starred in I'm A Celebrity... Get Me Out Of Here in 2008, said she and Joe immediately fell in love with their new baby.
She said: "Joe said when he was born, he took one look at him and thought 'You're going to be able to take care of yourself just fine'. He's so strong as soon as he came out he was trying to lift his little head. I think he's going to be inquisitive, like his big sister and if he's got even half her energy, I'm going to be on the go all the time."
Cole admitted to hiring a sleep expert to help after a string of sleepless nights with Ruby, saying: "With Ruby, I was so desperate to be the perfect mum, I ended up getting so stressed and slipping into bad habits and that wasn't good for any of us.
"I didn't want to admit I was struggling because I thought that would mean I'd failed. But Ruby being up all night was having such a bad effect on me and on mine and Joe's relationship - we were snapping at one another and it was making me so miserable."