For those of us who grew up in the '80s and '90s, movies like "Hook," "Jumanji," "FernGully," "Mrs. Doubtfire" and "Aladdin" were on repeat in our VCRs and Robin Williams was more than just a household name ... he was our childhoods.

The actor's apparent suicide on Monday came as a shock to not just Hollywood, but to the many fans the beloved comedian had amassed throughout his successful career and those whose lives he touched personally or via his films.

Robin's young "Mrs. Doubtfire" costars shared their memories following his death.

Matthew Lawrence tells toofab, "I am devastated. He was the single most important influence in my career and not a day goes by I don't appreciate the time I got to spend with him. My deepest thoughts and prayers are with his family."

Lisa Jakub, who played his oldest daughter in the film, also opened up about a moment she'll always remember -- describing how she was kicked out of school at age 14 because they were "not equipped" to teach her while she was on location to film the 1993 for five months.

"Robin noticed that I was sad and asked me what was wrong. I explained what had happened, and the next day, he handed me a letter that he wrote to my school. He explained that I was just trying to continue my education while pursuing my career. He wrote embarrassingly kind things about my character and my work ethic, and requested that they reconsider and allow me to return to my classes," Jakub says.

"Robin stood up for me. He was in my corner. I was only 14, but I had already seen that I was in an industry that was full of back-stabbing. And it was entirely clear that Robin had my back," she continues. "I always assumed there would be some future opportunity to tell him that his letter changed my life. It taught me that you stand up for the things that matter. And even if your attempts fail, you tried. You told the truth. You took care of your friends. You fought back."

Matthew and Lisa wasn't alone in their admiration for Robin when it comes to his "Mrs. Doubtfire" costars.

Pierce Brosnan says he's feeling "deep sadness" about Williams' passing, calling the late actor "the best." Check out the video above to hear what else the actor says about Robin.  

In a statement to FOX 411, Sally Field says "He always lit up when he was able to make people laugh, and he made them laugh his whole life long... tirelessly. He was one of a kind. There will not be another. Please God, let him now rest in peace."

And Mara Wilson, who played the youngest Hillard daughter in the film, also shared her shock on Twitter -- tweeting "Very sad, very upset, very glad I did not have to hear about this though Twitter. Probably going to be taking some time off it for a while."

Click here to see what other celebrity fans had to say about Williams ... and read Ben Stiller's touching tribute here as well.

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