1/15. Robin Williams walked into an adult shop dressed as Mrs. Doubtfire to test the believability of his character. No one recognized him until he went up to buy a toy.
2/15. During filming, Williams had to sit in the makeup chair for 4 ½ hours every day in order to become Mrs. Doubtfire.
3/15. Lisa Jakub, the actress who played Robins’ eldest daughter Lydia, was kicked out of her Toronto school for taking a five-month-long hiatus to film the movie. Robins personally sent a letter to the school asking them to reconsider their decision. The school framed the letter, but they didn’t reconsider their decision.
4/15. When Miranda gives the Hillard’s home address to Mrs. Doubtfire over the phone, she names the actual address where the movie was shot: 2640 Steiner St.
5/15. The icing melting off of Mrs. Doubtfire's face was completely unintentional. The set lights were very hot, and it unexpectedly began dropping from his chin. Williams went along with it and improvised the majority of this scene.