Si chiama Jess Smith e oggi ha 19 anni.
In 1996, her mother, Anji Smith, 44, took her to Edenbridge Hospital to be weighed and a health visitor, who had been asked by Ragdoll Productions to find smiley babies, put Jess's name forward.
Mrs Smith said it was never intended to be a big thing: "It was just something a bit different to do and we didn't expect it to be as big as it was.
"They just sat her in front of a camera and she just laughed and smiled at her dad.
"We didn't hear anything until we got a letter when she was 18 months old saying she'd been picked.
"It was really weird seeing her on television."