Newspapers have claimed that "You're Beautiful" is about a former girlfriend of Blunt, Dixie Chassay, casting assistant for the Harry Potter films, although Blunt refuses to confirm or deny this. On 8 March 2006 on The Oprah Winfrey Show, Blunt said of the song, "It's kind of miserable. It was about seeing my ex-girlfriend on the Underground in London with her new man, who I didn't know existed. She and I caught eyes and lived a lifetime in that moment, but didn't do anything about it and haven't seen each other since. " According to Blunt, he wrote the lyrics of the song at home in two minutes after meeting her, and then finished the song with Sacha Skarbek in Los Angeles, and with Amanda Ghost also credited as a co-writer. Blunt said of the song: "It's always been portrayed as romantic, but it’s actually a bit creepy. It’s about a guy (me) who’s high and stalking someone else’s girlfriend on the subway. And then the stalker kills himself. " In an interview with HitQuarters, co-writer Sacha Skarbek said that Blunt brought the title, verses and the approach of the chorus to a songwriting session. Skarbek's contribution largely focused on the music aspect to the track, contributing chord ideas for the verses, honing the melodies, and making sure the song stuck to, "a couple of key hooks rather than making it too complicated".