In which movie does Robin Williams' character have to disguise themselves into a woman?

The answer is Mrs. Doubtfire. In the movie, Robin Williams plays the character of a divorced father who is determined to spend time with his children. In order to do so, he disguises himself as an elderly British nanny named Mrs. Doubtfire, fooling his ex-wife and successfully gaining employment as their nanny. Through this disguise, he effortlessly transforms into a charismatic and caring woman, allowing him to be close to his kids while navigating the challenges that arise from his double life.