Belle is Katie's daughter with her boyfriend James, and in an exclusive interview and photoshoot with HELLO! magazine, Katie reveals how the arrival of the little girl has changed their lives.
"People used to say to me, 'It's a love like no other,' and I understand that now," Katie, 30, told HELLO! "She's so precious and I just feel so incredibly blessed to have her. She's our world."
The birth of baby Belle, who was born via Caesarean on March 14 was something of a miracle as Katie thought she would have trouble concieving after the brutal acid attack she suffered in 2008.
And Katie, who has undergone more than 100 operations as a result of attack, says that giving birth in a hospital brought everything full circle.
"To have had my own life saved in hospital and then to be there giving life to this precious little person, I thought, 'This is why, this is what it's all about.' I already felt grateful that, after the attack, I'd managed to restore a life, have a job, friends, a social life, and I thought, 'You can't expect to have everything, this is enough'.
"Then, to meet and fall in love with James, a man I knew I wanted to have a baby with and who makes me so happy, and now to have Belle – it's just amazing. Most of all I want her to be happy. I thought I knew, after all that happened to me, what happiness meant, but having Belle has shown me what true fulfilment is."
For extra pictures of Katie and her beautiful baby, get our iPad edition, available at bit.ly/LHNsef.