Prince William cracked a joke about his hair while complimenting a woman's bright locks on his way to a royal engagement.

Prince William may be the heir to the British throne, but that doesn't mean he's unwilling to crack a joke at his own expense. Case in point? His recent visit to a referee training course in the West Midlands,

Prince William is a royally good sport. The Prince of Wales, 42, cracked a joke about his thinning hair while in the West Midlands on Tuesday. Prince William greeted a slew of locals, and one woman in particular – who sported bright red hair – caught his eye during the walk-through.