4. John Cleese. One of the funniest men in the history of comedy has a law degree from no less than Cambridge. But he didn’t leave the jury rolling in the aisles: Cleese never actually practiced. After meeting writing partner Graham Chapman at school, Cleese went on to co-found a little comedy troupe called Monty Python.
9. Ozzie Nelson. The Adventures of Ozzie and Harriet star graduated from Rutgers, law degree in hand, in 1930. This no doubt came in handy when he negotiated the first-ever “noncancellable ten-year contract,” an agreement with ABC that gave the Nelsons a salary for 10 years, even if they weren’t working.
17. Fidel Castro. Castro was admitted to the bar in 1950 after studying at the University of Havana. He had his own firm for a time – Azpiazo, Castro & Resende.
But that's just a few examples from a list of 30 at mental_floss. Link