Alfie Patten, 13, became a father four days ago when his girlfriend Chantelle Steadman, 15, gave birth to 7lb 3oz Maisie Roxanne.
Maisie was conceived after Chantelle and Patten - just 12 at the time - had a single night of unprotected sex.
Patten revealed how he decided against an abortion after discovering she was pregnant.
"I thought it would be good to have a baby," the Sun quoted him as saying.
"I didn't think about how we would afford it. I don't really get pocket money. My dad sometimes gives me 10 pounds."
Chantelle and Patten insist that they have been supported by their parents.
"I didn't know what it would be like to be a dad. I will be good, though, and care for it," said Patten.
Patten's dad Dennis told how the boy does not really understand the enormity of his situation, but is keen to be a devoted and responsible father.
"He could have shrugged his shoulders and sat at home on his Playstation. But he has been at the hospital every day," said Patten.
Chantelle admitted they made a mistake, but vows to be loving parents.
"We know we made a mistake but I wouldn't change it now. We will be good loving parents," she said.
"I have started a church course and I am going to do work experience helping other young mums.
"I'll be a great mum and Alfie will be a great dad," she added.
Chantelle's mum said: "I told her it was lovely to have the baby but I wish it was in different circumstances. We have five children already so it's a big financial responsibility. But we are a family and will pull together and get through.
"She's my daughter. I love her and she will want for nothing," the mother added.&13;&13;