Newsround can exclusively reveal that actress Jessie Cave has been cast as Lavender Brown in the next Potter film.
She beat off competition from thousands of other girls who were all desperate to spend much of the Half-Blood Prince snogging Rupert Grint.
Jessie is 20 years old. Your first chance to see Jessie on screen though will be in CBBC drama Summerhill going out early next year.
It's not known if Jessie attended the open auditions for Lavender.
They were were held earlier this year. Or she may have auditioned separately for the part.
Lavender Brown becomes Ron Weasley's first girlfriend in the sixth Potter book, and the pair get on everyone's nerves because they can't stop kissing!