Emma Watson attended the premiere of *Harry Potter and the Half-Blood Prince* at the Ziegfeld Theatre in New York in 2009, dazzling in a floor-length vintage Ossie Clark gown. The dress, featuring a deep V-neck and flowing silhouette, showcased her evolving red carpet style. Watson paired her look with natural makeup and soft waves, striking a balance between youthful charm and sophisticated elegance. The event was a milestone, reflecting both the series' growing global success and Watson’s transition into a mature fashion presence.