Entertainment world shocked, devastated by Robin Williams' sudden death

Robin Williams appears onstage at The 2012 Comedy Awards in New York, Saturday, April 28, 2012.

HOLLYWOOD (WJLA/ABC News/CNN) -- Robin Williams, who died Monday at 63, was a comedic inspiration for many performers, and he also was a brilliant dramatic actor.

In 1998, he won an Academy Award for best actor in a supporting role for his performance in "Good Will Hunting."

Here are some reactions posted on Twitter from those who worked with Williams and those who looked up to him professionally:

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.

— Conan O'Brien (@ConanOBrien) August 12, 2014

RIP Robin. I will always remember you as one hell of a friend. I love you and will miss you terribly.

— Lance Armstrong (@lancearmstrong) August 11, 2014

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.

— Larry King (@kingsthings) August 11, 2014

Condolences to the whole world. @robinwilliams RIP. #RobinWilliams

— Drew Carey (@DrewFromTV) August 11, 2014

I could not be more stunned by the loss of Robin Williams, mensch, great talent, acting partner, genuine soul.

— Steve Martin (@SteveMartinToGo) August 11, 2014

RIP Robin Williams. Such a loss. He will be gone but never forgotten. #RIPRobinWilliams

— Morgan Freeman (@Morrgan_Freeman) August 11, 2014

I met this sweet, generous & brilliant man Robin Williams in 1991. Here we are with HIS idol Jonathan Winters. #RIP

— Kathy Griffin (@kathygriffin) August 11, 2014

I can't believe the news about Robin Williams. He gave so much to so many people. I'm heartbroken.

— Ellen DeGeneres (@TheEllenShow) August 11, 2014

I'm in utter disbelief that Robin Williams is dead.

— Dane Cook (@DaneCook) August 11, 2014

Ah Robin, I'm so sorry the earth couldn't stay worthy of you. Hope happiness awaits you.

— jason alexander (@IJasonAlexander) August 11, 2014

Robin Williams ~ Vaya Con Dios my friend , I love you

— George Lopez (@georgelopez) August 11, 2014

He taught me to care about everyone on a show. From top to bottom he took time for all. A gr8 talent. Big loss :(

— Fran Drescher (@frandrescher) August 12, 2014

No no. Don't let this be. RIP my dear Robin.

— Kristin Chenoweth (@KChenoweth) August 11, 2014

We will try to carry on, but it won't be any fun without you. #RIPRobinWilliams

— Jon Cryer (@MrJonCryer) August 11, 2014

RIP mr Williams - beyond great talent -such a kind and lovely person

— John Cusack (@johncusack) August 11, 2014

We mourn the loss of our friend Robin Williams, who always made us laugh and smile.

— Sesame Street (@sesamestreet) August 11, 2014


— Margaret Cho (@margaretcho) August 11, 2014

My Heart's broken. Robin was a beautiful, kind soul. Can't bear that he's gone. So incredibly sorry for his family.

— Minnie Driver (@driverminnie) August 11, 2014

RIP @robinwilliams You were one of the very best that ever was. You were one of my heroes. #RobinWilliams

— Joel McHale (@joelmchale) August 11, 2014

Honored to have worked w such a bright light and brilliant man. Love and prayers to his family and friends. #RIPRobinWilliams

— Mandy Moore (@TheMandyMoore) August 11, 2014

Oh. My god. My heart goes out to all who knew and loved Robin Williams.

— Martha Plimpton (@MarthaPlimpton) August 11, 2014

The first autograph I ever got: Dear money, send mom. Robin Williams

— John Stamos (@JohnStamos) August 11, 2014

Robin was as sweet a man as he was funny. If you're sad, please tell someone.

— Jimmy Kimmel (@jimmykimmel) August 11, 2014

So sad so funny

— Chris Rock (@chrisrock) August 11, 2014

I can't take the Robin Williams news. I've never cried over someone I've never met but I can't stop ????????

— Miley Ray Cyrus (@MileyCyrus) August 11, 2014

The last time @tomhanks and I saw our sweet friend Robin a few months ago with his and our dear friends from NorCal.

— Rita Wilson (@RitaWilson) August 12, 2014

#RIP Robin will be remembered by many...

— Eva Longoria (@EvaLongoria) August 11, 2014

At a time like this it's hard to find the words...thank you Robin Williams for the laughter and so much more. Prayers for his family. #RIP

— Robin Roberts (@RobinRoberts) August 11, 2014

So sad about Robin Williams...??

— KATY PERRY (@katyperry) August 11, 2014

His heart was as big as his genius. So sad. Rest in Peace Robin Williams.

— bob saget (@bobsaget) August 11, 2014

The world has lost a comic genius & huge talent. Interviewing Robin Williams was like taking the wildest roller coaster ride of your life.

— Katie Couric (@katiecouric) August 11, 2014

Today we lost a true artist. My prayers are with the family of Robin Williams. We are forever grateful for the joy he brought into the world

— Tony Robbins (@tonyrobbins) August 12, 2014

The entire Osbourne Family is grieving the loss of a kind, funny, generous and talented man, Robin Williams.

— Sharon Osbourne (@MrsSOsbourne) August 11, 2014

Robin Williams was an amazing man - a talent with few equals who never lost sight of the adage "to whom much is...

— Montel Williams (@Montel_Williams) August 11, 2014

On our wall. Very sad. #RIPRobinWilliams

— Chris Meloni (@Chris_Meloni) August 11, 2014

My heart hurts for the Williams family. So so sad :( we love you robin! We love you mrs doubtfire!!

— Hilary Duff (@HilaryDuff) August 11, 2014

RIP to my dear brother and friend Robin Williams. The world will miss the decades of laughter that you gave all of us.

— Quincy Jones (@QuincyDJones) August 11, 2014

— Sarah Michelle (@RealSMG) August 12, 2014