Georgia Nathalie Lock (born 25 October 1996) is an English actress and presenter. She starred in the children's series Sadie J, The Evermoor Chronicles, and presented the CBBC magazine show Friday Download. Lock was born in Aylesbury Vale and grew up in rural Buckinghamshire. She attended Waddesdon Church of England School. Her mother began taking her to drama classes in Winslow when she was eight. In 2010, Lock was cast as the main character in the CBBC television show Sadie J, which ran for three series from 2011 to 2013. In addition to playing the lead, she recorded the theme song, "In A Boy's World". The theme tune was officially released by Demon Records, in association with the BBC. A shortened version of the song is used for the Sadie J title sequence.
