Harry Styles' sister Gemma is used to cheering on her brother from the audience during One Direction concerts.
However, on Wednesday the tables were turned as it was Harry, 19, proudly watching from the crowd as his sibling graduated from Sheffield Hallam University.
Sat beside his mother Anne Twist, Harry beamed with delight as his 22-year-old sister accepted her first class honours degree in Science Education with QTS during the ceremony at Sheffield City Hall.
Wearing her cap and gown, Gemma posed alongside her brother for official photographs, which were posted on the university's official Twitter feed.
The university tweeted several photos of the famous 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.
'@GemmaAnneStyles a massive congratulations on your degree! Hope you have a wonderful day with your family.'
Gemma was presented with her degree by fertility expert and Sheffield Hallam University Chancellor, Professor Robert Winston.
The graduate herself posted a photo of herself on her Instagram in her graduation robes, writing: 'I have never felt clevererer. #graduation.'
The siblings' proud mother Anne also tweeted: 'Very proud of my beautiful @GemmaAnneStyles today. You suit a nice hat.'
During Gemma's studies, Harry often visited her in Sheffield during his breaks in One Direction's busy schedule and was spotted partying at halls of residence and the student union.
Gemma, who is three years older, and Harry grew up with their mother Anne in Cheshire, who recently remarried their stepfather Robin Twist this summer.
Harry is so fond of his sister, he has her name tattooed in Hebrew on his left shoulder.
The blonde graduate has proved so popular with One Direction fans eager to find out what Harry is up to, she has nearly 2million Twitter followers.
When Gemma received her grades in July, Harry treated his sister to a holiday in the US to join One Direction on tour.
He tweeted at the time: 'Well done to my annoyingly clever sister @GemmaAnneStyles on completing her education! I'm so proud of you .xx,'