TV Article Hermione Granger 36th birthday: Harry Potter stars through the years Accio, nostalgia. By Madeline Boardman Madeline Boardman Madeline Boardman is a former digital features director at Entertainment Weekly. She left EW in 2017. EW's editorial guidelines Published on September 19, 2015 02:02PM EDT The magical world’s favorite Muggle-born bookworm, Hermione Granger, celebrates her 36th birthday on Saturday. In honor of the capable witch’s special day, EW is taking a trip down memory lane all the way to Diagon Alley and back again. See just how much Hermione (Emma Watson), her comrades, and her Hogwarts classmates changed over the course of the film series by clicking to flip, ahead.