One year ago today, Robin Williams passed away at the age of 63, leaving behind a legacy of comedic greatness. Today, several Hollywood stars took to their social media platforms to honor the late legend on the one-year anniversary of his sudden death, the most poignant of which may have been from Sarah Michelle Gellar, who played his TV daughter on CBS' The Crazy Ones. Here's what she had to say on Instagram earlier today, which included a photo of the iconic park bench from 1997's Good Will Hunting.

"'To laugh often and much; to win the respect of the intelligent people and the affection of children; to earn the appreciation of honest critics and endure the betrayal of false friends; to appreciate beauty; to find the beauty in others; to leave the world a bit better wether by a healthy child, a garden patch, or a redeemed social condition; to know that one life has breathed easier because you lived here. This is to have succeeded' #Emerson You succeeded RW #RobinWilliams"

Several others such as Zoe Saldana, John Stamos, Josh Gad, LeAnn Rimes and Perez Hilton, just to name a few, offered their own tributes today through Twitter and Instagram, in tribute to the beloved comedian. The actor's daughter Zelda Williams revealed last month that she will be, "taking a break" from her social media platforms, stating, "it's a time better served away from the opinions or sentiments of others, and I appreciate your understanding." Robin Williams is survived by Zelda, his wife Susan Schneider and his sons Zak and Cody.

The actor's last movie, Boulevard, debuted in theaters on July 10, after debuting at the Tribeca Film Festival last year. Boulevard centered on a married but closeted 60 year-old bank employee (Robin Williams) whose life changes in unexpected ways after recklessly picking up a young male hustler. The actor also provides the voice of Simon Pegg's dog in the upcoming comedy Absolutely Anything, which debuts in theaters September 4.

We're sure many more celebrities and fans will chime in with their thoughts on this tragic anniversary, but for now, we've compiled some of our favorite Robin Williams tributes below. Do you have a favorite Robin Williams movie that you'll be watching today in honor of his tragic passing? Let us know what you think after checking out these moving tributes to the late Robin Williams.