Friday would have been the late, great Robin Williams' 72nd birthday, and two of his children shared beautiful posts on social media to honor the actor who died in 2014 at the age of 63.

Williams' son Zak wrote:

“Happy 72nd Dad!"

"Was remembering how much I used to love that look you'd give."

"That look with a mischievous, loving grin that your friends and loved ones knew so well. Joyous and curious and wondrous."

“Miss you and love you forever!”

A photo of "that look" is below.

Williams' daughter Zelda celebrated her father's birthday on Twitter by sharing a photo of him picketing during the 2007 strike with a sign reading "SAG WGA ON STRIKE" and noted he would definitely be out "fighting the good fight for art and artists today and always."

People on social media also sent their love, as well as birthday wishes, many adding special memories of Zak and Zelda's father.

Happy birthday to Robin who is dearly missed by all.