Here is a sampling from Twitter:
— Sarah Michelle (@RealSMG) August 12, 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
Robin Williams ~ Vaya Con Dios my friend , I love you — George Lopez (@georgelopez) August 11, 2014
I’m so sad and devastated to hear of the passing of Robin Williams. My thoughts are with his family. — Sharon Osbourne (@MrsSOsbourne) August 11, 2014
Rest in Peace to the main man Robin Williams, 🙁 — ROBERT KARDASHIAN (@robkardashian) August 11, 2014
Oh Jesus I am crushed to hear about Robin Williams’ passing. So fucking sad and surreal. Just awful. — Chris Hardwick (@nerdist) August 11, 2014
So sad Robin Williams died 🙁 We did 2 films 2gether. He ws a very lovely man & kind caring person. My heart goes out 2 his loved ones. — Fran Drescher (@frandrescher) 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
Robin Williams, you will be so so missed. I am heartbroken. — Whitney Cummings (@WhitneyCummings) August 11, 2014
Oh My God RIP Robin Williams — billy eichner (@billyeichner) August 11, 2014
Holy Shit. That’s so sad. R.I.P. Robin Williams — samantha ronson (@samantharonson) 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
No no. Don’t let this be. RIP my dear Robin.
— Kristin Chenoweth (@KChenoweth) 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
Oh Robin — Cher (@cher) August 11, 2014
Robin — you will be missed. So sad. So very very sad. — Penn Jillette (@pennjillette) August 11, 2014
Can you think of anybody more full of life than Robin Williams!?!? So sad.
— Andy Cohen (@Andy) August 11, 2014
Please tell me this Robin Williams news is false!!!!!!
— Jamie Kennedy (@JamieKennedy) August 11, 2014
Robin Williams could not have been kinder or more generous when I worked with him in Flubber. My heart goes out to his family.
— Wil Wheaton (@wilw) 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
Mr. Williams visited me the first day of filming The Parent Trap. I will never forget his kindness. What an enormous loss. My condolences.
— Lindsay Lohan (@lindsaylohan) August 11, 2014
Deeply sad to hear Robin Williams has left us. Thank you for the inspiration, man- I wouldn’t be doing what I do now if it weren’t for you.
— Darren Criss (@DarrenCriss) August 11, 2014
RIP Robin Williams. Your work has brought joy and laughter to millions of people. May you find your deserved solace in the next life.
— Jared Padalecki (@jarpad) August 11, 2014
RIP mr Williams – beyond great talent -such a kind and lovely person
— John Cusack (@johncusack) August 11, 2014
Heart broken!!! #RIP Robin Williams!! Praying for your family on such a sad day. You’ve given so much joy to so many. Devastating we lost u
— Khloé (@khloekardashian) August 11, 2014
— Joel McHale (@joelmchale) 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
If you’re feeling overwhelmed & seems like theres nowhere to turn, I urge you to call National Suicide Prevention line 1-800-273-TALK (8255)
— Avan Tudor Jogia (@ATJogia) August 11, 2014
Devastating finding out about @robinwilliams today. He was an amazing talent and incredibly sweet. So sad.
— Kelly Clarkson (@kelly_clarkson) August 11, 2014
Oh Robin…Our hearts are broken. Rest in peace darling. We loved you.
— Goldie Hawn (@goldiehawn) 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
Nooooo, @robinwilliams One of the most talented and creative people that ever lived. RIP
— Matthew Morrison (@Matt_Morrison) August 11, 2014
— yvette nicole brown (@YNB) August 11, 2014
Cannot believe the news about Robin Williams RIP
— JWOWW (@JENNIWOWW) August 11, 2014
Robin Williams. Stunned…just stunned. RIP you brilliant brilliant man.
— Audra McDonald (@AudraEqualityMc) August 11, 2014
His heart was as big as his genius. So sad. Rest in Peace Robin Williams.
— bob saget (@bobsaget) August 11, 2014
Robin Williams has died and I am very sad. From every comedian here at the Edinburgh Fringe Festival, we salute him & we say goodbye
— Eddie Izzard (@eddieizzard) August 11, 2014
RIP Robin Williams.. So fucking horrible. I will always cherish so many performances.. — Grant Gustin (@grantgust) August 11, 2014
Robin Williams! Your work! Your heart! Your brain! So much left for you to do. So much more to love you for! Heartbroken. Rest in peace. — Alyssa Milano (@Alyssa_Milano) August 11, 2014
The world is a lot less funny today. Prayers with Robins loved ones. RIP.
— Lucy Hale (@lucyhale) August 11, 2014
Thank you to the beautifully original + brave artist that is #RobinWilliams. You taught us how to stand on the edge, fearless, + shine.
— JARED LETO (@JaredLeto) August 11, 2014
It’s the mark of a true artist. I never knew him but I’m heartbroken by his passing. RIP Robin Williams. — Jesse Tyler Ferguson (@jessetyler) August 11, 2014
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.
— Mara Wilson (@MaraWritesStuff) August 11, 2014
Robin Williams made the world a little bit better. RIP.
— Steve Carell (@SteveCarell) August 11, 2014
I didn’t know I could be so sad, angry, stunned and grateful at the same time. RIP Robin Williams. If you are in pain please seek help.
— Jim Gaffigan (@JimGaffigan) August 11, 2014
We mourn the loss of our friend Robin Williams, who always made us laugh and smile. pic.twitter.com/UOY8LTjVRA
— Sesame Street (@sesamestreet) August 11, 2014
When I worked at the factory I dreamed I worked with Robin Williams and he was kind and hilarious but real life Robin was even better. #RIP
— Tom Arnold (@TomArnold) August 11, 2014
Can’t believe we lost a legend today. RIP Robin Williams- your legacy will live on forever.
— Diddy (@iamdiddy) August 11, 2014
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
— Henry Winkler (@hwinkler4real) August 11, 2014
A massive loss to all of us, the power of a true artist is being felt today, a fully deserved rest in peace to the great Robin Williams
— Taylor Momsen (@taylormomsen) August 11, 2014
— Beth Behrs (@BethBehrs) August 11, 2014
Genie. You’re free. pic.twitter.com/FWQWPDPP42
— Evan Rachel Wood (@evanrachelwood) August 11, 2014
Famously kind, ferociously funny, a genius and a gentle soul. What a loss. #RobinWilliams
— Michael J. Fox (@realmikefox) August 12, 2014
Please share your thoughts about the passing of Robin, and his impact on the world of comedy, in the comments below.