Watson admits she would don donations from her relatives or pick out bridesmaid dresses from London department store Harrods as a last-minute alternative.
She tells Britain's Vogue magazine, "Everyone imagines stylists were on tap from the studio, but we got nothing. Sometimes I had two days' notice before an event and there was nothing appropriate for a 14 year old to wear. I'd look in my wardrobe and there was literally nothing. It was either borrow from my stepmother, or go to the bridesmaid department at Harrods."