The girl (names withheld) who was pregnant at the age of 11 while still in primary school gave birth to a baby girl last weekend at 12 years and three months.
The new mom who has a three-year-old sister and a nine-year-old brother is five months younger than the UK's previous youngest mother, Tressa Middleton.
The young couple from North London who met in 2012 when she was ten and he was 12 are now in high school are reported to be 'completely in love' as they've been dating for a year.
They have the lowest combined age of any British parents on record. Meanwhile, the girl's 27-year-old mother who was a teenage mother herself, is now one of Britain's youngest grandmothers.
The girl's father who has shown his daughter support told LBC Radio: 'We only found out she was pregnant a month ago. That means she was eight months pregnant. The baby is going to come into the world no matter what.
'You can just be supportive about it. The families on both sides are going to be very supportive about it. It is heartbreaking, but you can't turn back time. You can only go forwards.
'We don't know where it happened. What you're implying is that we knew they were having intercourse in bedrooms. No. We cannot keep her wrapped up her whole life.
'I can't keep a watch on her 24-hours a day, seven days a week. You don't know what has gone on and once the mistake has been made, you just have to support them.'
