Harry Styles attended his sister Gemma's graduation.
The One Direction star proudly cheered on his older sibling as she received a first class honours degree from Sheffield Hallam University, where she had been studying Science Education with QTS.
Harry dressed up for the occasion by wearing a smart black blazer and a striped T-shirt, as he posed for photographs alongside his 22-year-old sibling, who smiled proudly in her cap and gown.
He uploaded pictures to his Instagram with the caption: "My sister graduated today. She's all clever and that."
The university also tweeted several photos of their celebrity guest at the ceremony, writing: "A special guest attended today's graduation ceremony to see his sister collect her degree! Welcome @Harry_Styles.
"Congratulations to @GemmaAnneStyles on her degree and a warm Sheffield welcome to her brother @Harry_Styles too. (sic)"
Harry, 19, often visited Gemma during her time studying in Sheffield as he was spotted partying at her halls of residence and in the student union when he had time off from his busy schedule with One Direction.
The pair grew up together with their mother Anne - who married their stepfather Robin Twist, who helped raise them, this summer - and Harry is so close to Gemma he had her name tattooed in Hebrew onto his left shoulder.
Harry previously lavished the blonde beauty with a trip to the US in July to join One Direction on tour to celebrate her finishing university.
He tweeted at the time: 'Well done to my annoyingly clever sister @GemmaAnneStyles on completing her education! I'm so proud of you xx (sic)"