Mary was on campus to present grants from The Crown Princess Mary Scholarship – a fund created to help exchange students who are studying abroad.
The princess, who celebrated her 15th wedding anniversary on Tuesday, was positively glowing during the engagement.
Married life clearly suits her!
Mary first met her husband Prince Frederik at Sydney CBD pub The Slip Inn during the 2000 Olympics.
And at the time the then 28-year-old had no idea she'd just met a Danish royal!
Frederik and Mary are now the proud parents of four children: Prince Christian, 13, Princess Isabella, 12, and twins Prince Vincent and Princess Josephine, both 8.