The film is 25 years old this year and some of the cast members got together to celebrate.
Lisa Jakub, who played the older sister Lydia in the film, shared a snap with her on-screen siblings Matthew Lawrence and Mara Wilson, as they were joined by Pierce Brosnan for the anniversary.
Brosnan played the role of Stuart Dunmeyer, who was the new love interest of the children's mother after a difficult marriage break up.
The late Robin Williams famously played the children's father, who disguises himself as a nanny named Mrs Doubtfire to spend more time with his children after the split.
The film is a family favourite and we're sure fans will be happy to see some of the cast back together.