The second-in-line to the throne looked smart in a navy suit as he walked around the grounds of St John's College at the famous institution on Tuesday morning (7 January).
Today was the Duke of Cambridge's first day as a student on a specially designed agricultural management course organised by the Cambridge Programme for Sustainability Leadership.
Although the ten-week course was designed for William, 31, BBC News reports he will study alongside PhD students in some classes.
William travelled by train from King's Cross Station this morning. It's thought he will commute each day from his London home with the occasional overnight stop in Cambridge.
A spokesperson for the palace said: "The executive education programme of seminars, lectures and meetings will draw on the strengths of academics across the university. It will start in early January and run until mid-March.
"The course has been designed to help provide The Duke with an understanding of contemporary issues affecting agricultural business and rural communities in the United Kingdom."
On his walk this morning, the Duke was joined by Vice-Chancellor Professor Sir Leszek Borysiewicz, the Master of St. John's College, Professor Christopher Dobson, and Polly Courtice, from the Cambridge Programme for Sustainability Leadership.
William graduated from St Andrews University in Scotland with a 2:1 degree in geography in 2005. It was here that he met his now-wife Kate, Duchess of Cambridge. They became first-time parents in July 2013 when Kate gave birth to Prince George, the third in line to the throne.
William left his role as an RAF search and rescue pilot at Valley on Anglesey in September in order to focus on royal duties and charitable work.
His next royal engagement will be travelling to Australia and New Zealand in April with wife Kate. It's been rumoured the couple will bring their infant son with them although the palace has yet to confirm this.