CAN you believe it's been 20 years since Mrs Doubtfire said "hello dear" for the first time?

Since then the Robin Williams comedy has firmly entrenched itself as a classic and was named the 67th funniest movie in the 20th century by the American Film Institute.

Here are seven surprising facts about cross-dressing nanny flick:

It was meant to be a Home Improvement movie: According to IMDB, the storyline for Mrs Doubtfire was originally an idea for a Home Improvement movie. The potential plot was that Tim 'the Tool Man' Taylor dressed up as an elderly nanny to see his three boys after divorcing his wife Jill. But Tim Allen hated the idea and felt there was no need for a Home Improvement film.

Robin Williams went into an adult store as Mrs Doubtfire: The actor recently revealed on Reddit that he once tested how convincing his costume was. "One time in makeup as Mrs. Doubtfire, I walked into a sex shop in San Francisco and tried to buy a (sex toy). Just because. Why not? And the guy was about to sell it to me until he realised it was me, Robin Williams, not an older Scottish woman coming in to look for a very large (sex toy) and a jar of lube. He just laughed and said 'What are you doing here?'. Did I make the purchase? No."

The cream scene was improvised: Remember when Mrs Doubtfire's cream face mask melts and a few dollops fall into the social workers cup of tea? It turns out that wasn't in the script. The studio lights were so hot that it started melting the cream and Robin Williams decided to roll with it.

The make-up took forever: Each day, Robin Williams had to sit in the make-up chair for four and a half hours to transform into Mrs. Euphegenia Doubtfire. The film went on to win the Academy Award for best make-up.

Happy ending: The script writer was fired because of the film's sad ending, according to IMDB. They hired a new writer and told him to rework the script so that Daniel and Miranda got back together in a happy ending. But after reading it, the producers realised the original script was better and rehired the fired writer.

Blake Lively was almost in the movie: Gossip Girl star Blake Lively was almost cast as Natalie Hillard. She got down to the final two in auditions, but lost out to Mara Wilson.

Sequel: Three potential scripts for Mrs Doubtfire 2 have been written but they've all been scrapped. But director Chirs Columbus is still keen to make a sequel, telling Huff Post Live in May that it's a very real possibility. "We've talked about it with Robin Williams, and the studio is interested in it," Columbus said. "The thing that fascinates me about a sequel to Mrs. Doubtfire is with most actors who create an iconic character like Mrs. Doubtfire, when you come back and do that character, well, you're twenty years older so, you're not going to look the same. The cool thing with Mrs. Doubtfire is there's a character, there's a woman, who is actually going to look exactly as she did in 1995."

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