Mr. & Mrs. Smith star Angelina Jolie is a fan of ex husband Billy Bob Thorntonsunmatchable wit and entertaining ability even ten years after their divorce. The Hollywood hotty, whowrote a foreward for Billys new book The Billy Bob Tapes: A Cave Full of Ghosts, says her ex has a bigbeautiful heart, Contactmusic reported. "He (Billy) has an unmatchable wit and can make you laughuntil your face hurts. To be with him is like being with a mad mathematician. He is constantly countingand repeating, Angelina said. "Some people walk through life able to quiet the voices in their heads.He can't. And I, and everyone else who knows him well, we love him for it. I know one thing: The worldwould certainly be a hell of a lot more dull if that man weren't in it," she added.