The actor who played the bartender in the “drive-by fruiting” pool scene is credited as Dr. Toad, but his real name was Robert Todd Williams, founder of a well-known Sonoma CA winery-and Robin Williams’ older brother. It was his only film credit.
1
During the restaurant scene when Mrs. Doubtfire’s teeth fell into the wine glass, the cast didn’t know Robin Williams would do that, and their reactions on film were genuine, mirroring the shock of the crew.
2
During shooting in San Francisco, once Williams had the makeup all fixed up in his Doubtfire disguise, he would walk about the city with nobody knowing they were actually seeing Robin Williams. He said: 'One time in makeup as Mrs. Doubtfire, I walked into a sex shop in San Francisco and tried to buy a double-headed d*ldo. Just because. Why not? And the guy was about to sell it to me until he realized it was me- Robin Williams - not an older Scottish woman coming in… He just laughed and said, “What are you doing here,” and I left. Did I make the purchase? No. Did I walk away with a really good story? Yes.'
3
The scene where Mrs. Sellner comes to inspect Daniel’s apartment and the icing on Mrs. Doubtfire’s face is melting off was not intentional. The heat from the set lights melted the icing on his face and Robin Williams improvised the bulk of that scene.
4
In 'Mrs. Doubtfire,' when the Hillard family is interviewing new babysitters, the list of babysitter names are the names of the film’s Associate Producer, Production Coordinator, Art Department Coordinator, and one of the Office Production Assistants.
5
Robin Williams used much of his real childhood nanny to characterize Mrs. Doubtfire. When British tabloids found this out, they went looking for his former nanny. They found his real nanny, “Lolly”, in a Michigan nursing home, and the reporters and photographers flocked to the little town to get an interview with her. Lolly balked at the attention and downplayed her impressive role. (The reporter found out Lolly had in fact been a nanny to other Hollywood celebrities, including Mr. and Mrs. Lyle Waggoner. As a result, the local newspaper ran a story of Lolly with the heading “The Real Mrs. Doubtfire”.
6
Chris Columbus was amazed how far Robin Williams took his performance. First, he played each scene as scripted two to three times and then was allowed to improvise, or “playing,” as Williams called it. Columbus allowed Williams a lot of improvisation because that was where the film’s funniest material came from; in fact, Columbus called it magical at times.
7
In 'Mrs. Doubtfire' (1993), Robin Williams whispers “##ck you” under his breath right before he throws the lime at Stu’s head in the run-by fruiting scene.
8
In “Mrs. Doubtfire” (1993), Miranda (Sally Fields) gives Mrs. Doubtfire the real address of the home where the movie was filmed when she calls to set an interview for the nanny position. 2640 Steiner Street, San Francisco, CA.
9
Talk of a sequel began in 2003, with a script being written by Bonnie Hunt. Robin Williams was set to return in disguise as an old nanny like in the first movie. Due to problems with the script, re-writing began in early 2006 as Robin was allegedly unhappy with the plot. The film was expected to be released in late 2007, but following further script problems, the sequel was declared “scrapped” in mid-2006. The sequel’s story was originally said to involve Williams, as Mrs. Doubtfire, moving close to his daughter’s college, so he could keep an eye on her. Serious discussions regarding the sequel re-ignited in April 2014, with an announcement that Robin Williams and Chris Columbus would be teaming up with Fox 2000 to produce the sequel. Williams’ sudden death just four months later ultimately sealed the project’s fate once and for all. No one replaced him either.
10
Chris Columbus would use two or three cameras at a time when shooting Robin Williams’ scenes, uncertain of what the famously improvisational actor would come up with. Columbus viewed shooting these scenes as if he were making a documentary. Apparently there are unreleased versions of the film that could be rated PG, and versions that could be rated R.
11
When Doubtfire's mask is ripped off in the film, the mask that falls on the ground was not actually worn by Williams. The real make-up was made up of eight separate pieces.