Joan Rivers, American T.V. presenter and stand-up condition, is reportedly on life support. She still remains in a medically induced coma, according to reports.

On Thursday, the comedienne, 81, was rushed to Mount Sinai Hospital, Manhattan after she stopped breathing during a throat surgery at a clinic. She was reportedly undergoing a vocal-cord surgery.

Citing a source who is close to Joan, TMZ reports that the acerbic comedianne is "completely reliant on machines to stay alive."

Melissa Rivers, 46, the only child of Joan River, flew in from Los Angeles with her teenage son, Cooper, to be at her mother's bedside. According to TMZ's sources, the family may have to decide soon on how long to keep Joan on life support.

TMZ also reports that it has been told that Joan's family is hoping that the octogenarian comedienne will "fight through it" and get better if they have to take the decision to turn off the machines.

Meanwhile, New York Daily News is reporting that Melissa is "in denial" about her mother's condition. "She still thinks everything is going to be OK. She is refusing to admit that a world might exist without her mother in it," a source close to the Rivers family said to New York Daily News.

There has been an outpouring of messages from celebrities on social media, wishing Joan a speedy recovery. Charlie Sheen said: "Please come back to us young lady. Your inimitable genius and compassion keeps a world you set in motion, a lot better every day." Lena Dunham posted that they cannot lose Joan. Courtney Love Cobain said, "hang in there Joan Rivers."

Montel Williams said in his message posted on Facebook: ‪"@joan_rivers YOUNG lady the world is not ready to be without Joan Rivers. Praying for you and your family as you make what I know will be a speedy recovery and I only wish I still had my show for your first post-recovery interview one thing i know for sure, Mt. Sinai Hospital is about to be a brighter, funnier place. Never have I met someone who could light up a room like Joan Rivers."

In a statement, Melissa said, "My mother would be so touched by the tributes and prayers that we have received from around the world."

4 the first time in years I got down on my knees & prayed tonight! I encourage U 2 do the same 4 @Joan_Rivers my grandma! #inconsolable

— Kelly Osbourne (@KellyOsbourne) August 30, 2014

Praying for @Joan_Rivers and @MelRivers. Even though Joan's the strongest woman I know, every single prayer counts. I love you, Joan

— Giuliana Rancic (@GiulianaRancic) August 30, 2014

.@Joan_Rivers Get well soon Joan - keep fighting!

— Donald J. Trump (@realDonaldTrump) August 30, 2014