As his daughter, Zelda Williams, put it, "It's that time of year again."
Today marks the two-year anniversary of Robin William's death in 2014
. To pay tribute to him, Sarah Michelle Gellar, Williams' co-star in one of his final projects, The Crazy Ones
, shared a touching photo of the two together.
"Time is the best teacher, but unfortunately, it kills all of its students," she captioned the picture, a quote often attributed to Williams online, though it was first spoken by French music critic Hector Berlioz.
SMG posted another Instagram of the comedian surrounded by underwear models in angel wings and wrote, "The way I like to think of you RW...with all the angels." She added the hashtag "miss you."
"I will always be so grateful for all the love the world had and continues to have for dad, but for obvious reasons, it's sometimes harder to be the sort of surviving public vessel for receiving those sentiments, and one often expected to somehow flawlessly express them back," the 27-year-old actress explained on Sunday. "I'll be excusing myself for a bit. Hearts just need little breaks sometimes!"
One of Williams' most iconic films, Hook, celebrated its 25-year anniversary this week and ET rounded up the Lost Boys to reflect on working with the actor. Hear what they had to say in the video below.