Soul star John Legend has been feted with an honorary doctorate at his alma mater in Pennsylvania.

The All of Me hitmaker headed back to school on Monday (19May14) to attend the University of Pennsylvania's commencement ceremony, 15 years after he donned the traditional cap and gown there for his graduation from the institution's College of Arts and Sciences with a degree in English.

His proud wife, model Chrissy Teigen, shared a snap of her husband on his big day with fans on her blog, and in the accompanying caption, she wrote, "my baby got another honorary doctorate! I have a bunch too I just don't brag about all the time (sic)."