Beloved comic and Oscar winner Robin Williams died Monday at the age of 63. Williams died of a suspected suicide, according to a statement from authorities in Marin County, Calif., where Williams was found dead.
Gellar later added in a statement to People: "My life is a better place because I knew Robin Williams. To my children he was Uncle Robin, to everyone he worked with, he was the best boss anyone had ever known, and to me he was not just an inspiration but he was the Father I had always dreamed of having. There are not enough adjectives to describe the light he was, to anyone that ever had the pleasure to meet him. I will miss him everyday, but I know the memory of him will live on. And to his family, I thank them for letting us know him and seeing the joy they brought him. Us crazy ones love you.
"God, grant me the serenity to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference."
Robin Williams was like no other ..To watch him create on the spot was a privilege to behold.. Robin you are an angel now !!! REST IN PEACE
I am completely and totally devastated. What more can be said?!
— Pam Dawber, Mork & Mindy co-star
I could not be more stunned by the loss of Robin Williams, mensch, great talent, acting partner, genuine soul.
No! Robin Williams you were so loved.
Absolutely stunned to hear the news about Robin Williams. It's unimaginable to me that we've lost such a genuinely funny and sweet man.
Robin was really sweet to me and my sister every time we saw him. He was a genius and made me laugh a lot. So sad.
RIP to my dear brother and friend Robin Williams. The world will miss the decades of laughter that you gave all of us.
I can't begin to tell you how much I will miss Robin Williams.
No no. Don't let this be. RIP my dear Robin.
Robin Williams could not have been kinder or more generous when I worked with him in Flubber. My heart goes out to his family.
Sweet gentle & BRILLIANT Robin Williams. Your smile lives forever in my heart. I am heartbroken. I will miss you. pic.twitter.com/Iu7blbJmfK
Can you think of anybody more full of life than Robin Williams!?!? So sad.
Terrible, Terrible news. @robinwilliams has died. So sad. Comedy has lost a great man.
My hero. My idol. My friend. I'm sick and shocked. Goodbye #RobinWilliams. You are now for the ages.
Uh uh. No. Don't want this to be true about Robin Williams. Inspired everyone I know. THE Improviser. :(
Ah Robin, I'm so sorry the earth couldn't stay worthy of you. Hope happiness awaits you.
I can't believe the news about Robin Williams. He gave so much to so many people. I'm heartbroken.
I am so heartbroken. Robin Williams was a light in my childhood. Rest in peace.
I'm in utter disbelief that Robin Williams is dead.
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.
Robin was friend, boss, brother, inspiration... His generosity & intelligence knew no limits. Only his home planet could destroy him.
RIP Robin Williams. He was great in What Dreams May Come and now he gets to find out if his Heaven is exactly as he made it. God bless.
Sorry to learn of the tragic death of Robin Williams. Spent a lot of time with him. Even performed with him in San Francisco. So sad.
Robin Williams was the first person ever to make me laugh other than my dad. #Mork
Robin Williams made the world a little bit better. RIP.
Robin Williams ... You were an idol and an inspiration. As a child I began to dream of making movies because ... http://t.co/0ebeDCFmNG
We mourn the loss of our friend Robin Williams, who always made us laugh and smile. pic.twitter.com/UOY8LTjVRA
I'll miss you, Pahpoh. You were such a part of all of our lives. There will never be another you. A sad, sad day. #RobinWilliams
Honored to have worked w such a bright light and brilliant man. Love and prayers to his family and friends. #RIPRobinWilliams
A tweet cannot begin to describe the hugeness of Robin Williams heart and soul and talent. This is so sad. #RobinWilliams
OK, Ill try. I met him when I was 13 and a huge fan and he was so kind and I watched him be kind to every fan i ever saw him with...
And with other actors he was so generous and brilliant. He made everyone feel special and equal around him even though he was the genius...
His heart was so big and even if you didnt know him, what he gave everyone was that same spirit in his work, so we all felt it
His impact on the world was so positive. He did so much good for people. He made me and so many people laugh so hard for a very long time.
I am named after a character from a Robin Williams TV show when my parents still lived in Africa. He meant so much, to so many, so far away.
Genie, you're free. pic.twitter.com/WjA9QuuldD