Updated

A 13-year-old British boy — with the physical appearance of a child much younger, standing at 4 feet tall — is the father of a new baby girl, The Sun reports.

Alfie Patten's girlfriend Chantelle Steadman, 15, became pregnant after a one-time tryst between the two, according to Alfie's father, Dennis.

"He didn’t know what he was doing and of the complications that could come," said Dennis Patten.

Click here to see photos of Alfie.

The young couple kept their situation a secret until Steadman's pregnancy began to show. She said she knew they made a mistake but would be loving parents.

"When my mum found out, I thought I was going to get in trouble. We wanted to have the baby but were worried how people would react," Alfie Patten said.

Despite being a young father, Alfie's father describes him as a typical boy who "loves computer games and boxing."

Britain’s youngest known father is Sean Stewart, who became a dad at 12 in 1998.

Click here to read the full story from The Sun.