Ruta Meilutyte claimed a gold medal for Lithuania in the 100 metres breaststroke tonight.
The 15-year-old led from start to finish to touch in one minute 05.47 seconds as she held off a fast-finishing Rebecca Soni, the Beijing silver medallist.
Meilutyte is coached by Jon Rudd at Plymouth Leander while studying at Plymouth College, the school also attended by diver Tom Daley.
"I cannot believe it," Meilutyte told BBC One.
"It's too much for me."
Looking at the camera and speaking in Lithuanian, she told her father in Plymouth: "Thank-you. I love you."