Educational qualifications are often viewed as a means to an end, whether that's an obvious vocational route, or an attempt to increase the earning potential of an individual. However, sometimes the thirst for knowledge and love of learning are reason enough to head back to school!
In the case of these celebrities, financial gain would certainly not have been their incentive. Rather, a sense of achievement, or perhaps setting an example for their children, might have been the motive.
Have a look through the gallery to find out who decided to go back to college and expand their minds.