Rivers was undergoing surgery on her vocal cords at a clinic in New York City on Aug. 28 when she stopped breathing and had to be transported to Mount Sinai Hospital.
Celebrities took to Twitter to pay their respects on honor the comedienne.
RIP Joan Rivers. People don’t know what a pioneer she was. Check out her documentary. Beautiful and heart breaking. Be at peace, Joan.
— Nick Swardson (@NickSwardson) September 4, 2014
My friend Joan Rivers has passed away once again to quote Billy Crystal… There are no words. Bon Voyage Joan
— Whoopi Goldberg (@WhoopiGoldberg) September 4, 2014
My heart is broken. Joan Rivers RIP. Gone way too soon. All my thoughts & prayers are with Melissa & her family.
— Jesse Tyler Ferguson (@jessetyler) September 4, 2014
My friend. RIPJoanRivers
— Margaret Cho (@margaretcho) September 4, 2014
RIP Joan Rivers. Yes, now we can talk.
— God (@TheTweetOfGod) September 4, 2014
NOOOOOOOO………. RIP Joan. You will be forever missed.
— Kelly Ripa (@KellyRipa) September 4, 2014
— Retta (@unfoRETTAble) September 4, 2014
RIP the mighty Joan Rivers. Funny & fearless. Truly one of a kind.
— Ricky Gervais (@rickygervais) September 4, 2014
RIP Joan Rivers. A force of nature.
— Seth Meyers (@sethmeyers) September 4, 2014
we lost a great one in @Joan_Rivers – she was funny all the way to the end
— Jimmy Kimmel (@jimmykimmel) September 4, 2014
Thanks for the laughter Joan. You will be missed. pic.twitter.com/26k7Pg0jQC
— Carson Kressley (@CarsonKressley) September 4, 2014
Oh, Joan. Thank you for being so kind to me & making me laugh until tears in those moments I got spend with you. Rest in peace.
— Jordin Sparks (@JordinSparks) September 4, 2014
Sad news, Joan Rivers just passed. R.I.P. Funny lady Thanks for the laughs & for your heart Hope the angels are laughing w/ you now
— LeAnn Rimes Cibrian (@leannrimes) September 4, 2014
I can’t believe you’re gone joan. The time I spent working with you was some of the best moments of my life. My heart aches for @MelRivers
— Beth Behrs (@BethBehrs) September 4, 2014
RIP #JoanRivers, as Laurel Thatcher Ulrich said: “Well behaved women seldom make history.” I hope we hear God laugh at a dick joke.
— Nia Vardalos (@NiaVardalos) September 4, 2014
Condolences to Melissa Rivers, whose house we visited a few weeks ago to spend an hilarious hour, In Bed with Joan. pic.twitter.com/gY0p2Qfh7P
— Simon Pegg (@simonpegg) September 4, 2014
— yvette nicole brown (@YNB) September 4, 2014
So funny and irrepressible. Rest in peace, Joan Rivers.
— bob saget (@bobsaget) September 4, 2014
Too much to say. A constant source of encouragement for me years before anyone else gave a damn. A full and fabulous life. Love you, Joan.
— billy eichner (@billyeichner) September 4, 2014
Love Her or Hate Her, we’re gonna Miss JOAN RIVERS! I always Respected her go for broke humor. One of a kind.R.I.P.
— Samuel L. Jackson (@SamuelLJackson) September 4, 2014
— Debi Mazar (@debimazar) September 4, 2014
Joan, I love you. So much. My heart is broken.
— Whitney Cummings (@WhitneyCummings) September 4, 2014
I’m making fun of everything. Just make fun of it and get on with it. -Joan Rivers
— Alec Mapa (@AlecMapa) September 4, 2014
— Kimora Lee Simmons (@OfficialKimora) September 4, 2014
— Sarah Hyland (@Sarah_Hyland) September 4, 2014
— Tara Reid (@TaraReid) September 4, 2014
— Taylor Momsen (@taylormomsen) September 4, 2014
Goodbye, Joan. You deserved a louder death. #RIPJoanRivers
— Patton Oswalt (@pattonoswalt) September 4, 2014
Joan Rivers was fucking awesome. RIP
— Adam Scott (@mradamscott) September 4, 2014
RIP Joan Rivers. You made us laugh and happy.
— Kristin Chenoweth (@KChenoweth) September 4, 2014
We will miss you @Joan_Rivers. What you did in your life was absolutely remarkable. Your rep for kindness to everyone was completely true
— Joel McHale (@joelmchale) September 4, 2014
She was trailblazing. Hysterical. Thoughtful. We’ll miss you immensely Joan.
— Ryan Seacrest (@RyanSeacrest) September 4, 2014
Joan Rivers has died. What a sad ending to a brilliant and tragi-comic life; one of the bravest, and funniest of all.
— Bette Midler (@BetteMidler) September 4, 2014
“My parents loved me. They use to test my bath water with my face” RIP JOAN. Legend. the definition of persistence. #Entertalking life guide
— Jamie Kennedy (@JamieKennedy) September 4, 2014
RIP GODDESS: Hail Hail, a GENIUS has vacated this realm: Joan Rivers has died.
— Roseanne Barr (@therealroseanne) September 4, 2014
Goodbye my friend Joan Rivers. You were a huge part of my professional life and you brightened up the horizon with your Chutzpah! Sad!
— Boy George (@BoyGeorge) September 4, 2014
RIP Joan Rivers. Being publicly told that my dress is hideous will never feel quite as awesome. You will be truly missed.
— Anna Kendrick (@AnnaKendrick47) September 4, 2014
Watch “A Piece of Work” or this (http://t.co/gQRRc3WuXQ) and fall in love with Joan Rivers, like I did. No one did it better for longer.
— Fred Savage (@thefredsavage) September 4, 2014
— Sarah Silverman (@SarahKSilverman) September 4, 2014
Watching Joan Rivers do standup at age 81 was incredible: athletic, jaw-dropping, terrifying, essential. It never stopped. Neither will she.
— Lena Dunham (@lenadunham) September 4, 2014
@Joan_Rivers Godspeed my sweet. Thanks for all the laughs. Thanks for all the love. I miss you already.
— Jane Lynch (@janemarielynch) September 4, 2014
Joan Rivers will always be a pioneer. She paved the way for a lot of comedians. I’m very sad she’s gone. pic.twitter.com/i1uE9fyHMh
— Ellen DeGeneres (@TheEllenShow) September 4, 2014
This Woman lived Life to thee fullest!!! You will be missed Always! 🙁 pic.twitter.com/59190aNoz5
— ROBERT KARDASHIAN (@robkardashian) September 4, 2014
Goodbye Joan. You were a bright light till the end. What a beautiful life and grand career you shared… http://t.co/eKMZZtftRJ
— ADAM LAMBERT (@adamlambert) September 4, 2014
We’d fuss but love was there. Cant believe ur gone. Love to your family. You were iconic and trailblazing. RIP Joan pic.twitter.com/hV7fH03gfw
— Lindsay Lohan (@lindsaylohan) September 4, 2014
RIP Joan Rivers… You made fun of my boobies just last week and it was an HONOR. Thanks for making so many people laugh here on Earth.
— Demi Lovato (@ddlovato) September 4, 2014
I am so sorry at the passing of Joan Rivers. She was a friend. She inspired me. She made me laugh since I was a kid, and I loved her so much
— Cyndi Lauper (@cyndilauper) September 4, 2014
We have lost a true legend. Thank you Joan for paving the way for broads like me. Sending love and prayers to @MelRivers and her family.
— Official Wanda Sykes (@iamwandasykes) September 4, 2014
— Juliette Lewis (@JulietteLewis) September 4, 2014
Joan Rivers was one of the smartest and most beautifully flawed women of all time.
— Molly Ringwald (@MollyRingwald) September 4, 2014
HRH let me know of the passing of Joan Rivers. She was a guest at our wedding. Terribly funny woman and quite the painter too. So sad.
— Camilla Cornwall (@CamillaCornwall) September 4, 2014
RIP Joan Rivers. Fearless & amazing. Here’s a clip from her great documentary where she DESTROYS a heckler: http://t.co/mO0u25Y6HN
— Aziz Ansari (@azizansari) September 4, 2014
R.I.P Joan Rivers. Thanks to you, I stopped dressing like a “hooker from the future”.
— AZEALIA ⚓️ BANKS (@AZEALIABANKS) September 4, 2014
Terrible news about Joan Rivers. I was lucky enough to meet her a few months ago. She was still as comedically relevant as anyone.
— Seth Rogen (@Sethrogen) September 4, 2014
Hard to say goodbye to my friend, Joan, a comedian who set the standard for funny. The world is sadder today. Rest in Peace.
— Joy Behar (@JoyVBehar) September 4, 2014
Joan Rivers was hoping for a far more interesting death: pic.twitter.com/g7bXbdwx20
— Letters of Note (@LettersOfNote) September 4, 2014
We lost one of the true originals today. Joan Rivers. A force. You will be missed. Love Hugh & Deb. @Deborra_lee
— Hugh Jackman (@RealHughJackman) September 4, 2014
You know I love you, Joan. Goodbye, through tears,Tiny Giant. Heaven just got meaner & way funnier. pic.twitter.com/EKymPWTn8Y
— Pee-wee Herman (@peeweeherman) September 4, 2014