Alfonso Ribeiro, who played Carlton on The Fresh Prince of Bel-Air, was speaking to students at the State University of New York, Oneonta this year. During the conversation he talked about Janet Hubert, who was the first Aunt Viv, before she was fired. He said she was a difficult person to work with, made tome together uncomfortable and oh yeah, she was crazy.
To quote Alfonso, Janet was "cuckoo."
Coincidentally, Janet is writing a book, throwing Will Smith under the bus.
Here's the video of Alfonso speaking on life on the Fresh Prince and Janet's crazy behavior.