Betty White celebrates her 91^st birthday Thursday, and we've uncovered a list of seven things you may not know about the beloved Golden Girl.

7. Betty is a renowned animal activist, and even debated a career as a zookeeper or forest ranger prior to making it in Hollywood. She turned down a role in 1997's As Good As It Gets because of a scene in which a puppy dog was hoisted down a laundry chute. Betty, who loves going to zoos on her cross-country travels, was made an honorary ranger by the U.S. Forest Service in 2010.