Singapore University of Social Sciences (SUSS) students had not taken much notice of the "quiet" guy in their classes for almost four years, so it came as a sur-prise when it emerged that he was the son of Indonesian President Joko Widodo.
Word soon got around after a student spotted a news item some time back that mentioned that "the Indonesia President's son is studying at SUSS".
So, all eyes were on 24-year-old Kaesang Pangarep when his identity as Mr Joko's younger son was confirmed at the university's opening convocation ceremony yesterday.
Mr Joko - better known as Jokowi - was in town for the Singapore-Indonesia Leaders' Retreat, and attended the ceremony amid camera flashes from members of the media and public alike.
President Halimah Yacob and Education Minister Ong Ye Kung were also there.
Mr Kaesang's girlfriend Felicia, who graduates this year, was also present. The Straits Times understands they met at the university.
About 2,000 SUSS graduands will receive bachelor's and higher degree certificates in five sessions being held until tomorrow.
Mr Kaesang, who graduated with a bachelor's degree in marketing, with a minor in communications, was also one of three students honoured for entrepreneurship.
The awards recognise graduating students who have shown strong entrepreneurial attributes such as leadership and a "high potential for achieving a positive impact on society", SUSS said.
Each winner received $5,000 in cash.
Mr Kaesang has founded six businesses, the latest being Ternakopi, a coffee delivery brand that has raised seed money from angel investors and venture capitalists.
His first start-up - established before he entered SUSS - was Sang Javas, which sold T-shirts. It was a flop, but that did not deter him.
During his four years at SUSS, Mr Kaesang also founded banana fritter franchise Sang Pisang, board game firm Hompimpagames, food app Madhang.id and restaurant app Kaetering, in addition to Ternakopi.
His coffee and banana fritter businesses have expanded to Kuala Lumpur, and he has plans to bring them to Singapore, he said.
Mr Kaesang told the media after the ceremony that he looked to his father as well as older brother Gibran Rakabuming as mentors, saying: "My father was a businessman before he entered politics. (So was) my brother. That is why I am so keen to enter the business area."
Mr Gibran, 32, also went to school in Singapore, graduating from the Management Development Institute of Singapore in 2007 before attending the University of Technology in Sydney.
Mr Kaesang's sister Kahiyang Ayu, 28, majored in food technology at Sebelas Maret University in Solo, Indonesia, and graduated in 2013.
Mr Kaesang said that doing a full-time, four-year programme at SUSS while managing his business ventures was quite challenging, but the university's flexible hours helped.
He added: "There are courses on (business) strategy - that is where I learnt how to strategise how to start my businesses. Within the four years, I started five businesses... those modules helped."
The young entrepreneur is also a social media star who runs a YouTube channel and an Instagram account with 1.6 million followers that he uses to publicise his business ventures.
Mr Kaesang, who graduated from Anglo-Chinese School (International) before entering SUSS, said he picked up English only after moving to Singapore.
When asked what Indonesian students could learn from Singapore schools, he said: "The way of life, because in Singapore, everything is about discipline. It has shaped the way I am."