Harry has Gemma's name tattooed in Hebrew on his left shoulder, and he was often spotted visiting her in Sheffield when his One Direction schedule allowed.
In fact, the star brought Taylor Swift to the city when he was dating her last December.
"@Gemma Anne Styles a massive congratulations on your degree!At the moment Niall is said to be completely oblivious towards Gemma's feelings. The news is a welcome distraction from One Direction's recent problems, after Louis Tomlinson and Zayn Malik were seemingly caught on camera smoking marijuana in Peru."He'll punch her arm and make jokes like they're mates," an insider giggled. By Laura Harding, Press Association Senior Entertainment Correspondent Rebel Wilson has joked that she has followed in the footsteps of Amy Schumer and Emily Ratajkowski by having her own surprise wedding.As he vigorously danced away to album track Kiwi, Harry Styles appeared to get overexcited.Jumping across the stage, the One Direction lad waved his arms in the air before falling flat on his backside.