The British comedy scene has been left in shock after the unexpected death of top manager and agent Addison Cresswell who passed away in his sleep at home on Sunday (21st Dec.) night aged just 53 after what is believed to have been a heart attack.

Michael McIntyre
The Agent Behind Some Of The Biggest Comedy Names (Such As Michael McIntyre, Pictured) Has Died.

A sorrowful statement released from his company confirmed "Agent, producer and charity fundraiser Addison Cresswell passed away in his sleep at home last night at the age of 53. "Widely considered to be one of the most influential figures in the entertainment industry, his clients included Jack Dee, Lee Evans, Jonathan Ross, Alan Carr, Michael McIntyre, Dara O Briain and Sean Lock.

"He leaves behind a proud legacy in his tireless charity work, initiating and organising the annual Channel 4 Comedy Gala in aid of Great Ormond Street Hospital. It was his dearest wish to raise enough to fund the opening of a brand new wing of the hospital, a goal that is now in sight.

"Addison will be fondly remembered by all whose lives he touched as a devoted mentor, a dear friend and an unforgettable character. He will be sorely missed. He is survived by his beloved wife, Shelley, his dogs Bonnie and Nessie and many, many pet fish."

Jack Dee
Celebrities Have Tweeted Their Sorrow Upon The News Of Cresswell's Death. (Jack Dee Pictured).

A shrewd businessman. Addison Cresswell began representing comedians in 1981, after starting from scratch. His company Off The Kerb has now grown into one of the biggest comedy agencies in the country, with its TV production arm, Open Mike, behind many hit TV formats. A notable moment in career was marked when he negotiated the £18 million golden handcuffs deal between the television presenting comedian Jonathan Ross and the BBC.

As the sad news has emerged, celebrities and comedians on the vibrant UK entertainment scene have sent out messages of anguish into the Twittersphere. "Like so many comedians I owe Addison Cresswell so much. To lose him marks the end of an era. May he rest in peace," Julian Clary wrote.

"Christmas lights in comedy-world a little darker this year: RIP Addison Cresswell," tweeted David Baddiel.

"RIP Addison Cresswell - the biggest pain in the a**e agent I ever dealt with, but very funny & cared passionately about comedy & his clients," said Piers Morgan.

Dara O'Briain
The Agent Is Remembered By Those Whose Careers He Managed, Including Dara O'Briain.

Stylist Gok Wan wrote: "Such sad news about Addison Cresswell passing.. A true maverick. My thoughts are with Shelley, daisy and Taylor and all the family x"

"So sorry to hear about Addison Cresswell, too young... An amazing man... My thoughts and prayers to his family and friends...." tweeted Davina McCall.

"I adored my manager Addison Cresswell. Am so shocked and saddened by his sudden death. He'd fight tigers for his acts. Irreplaceable," lamented Shappi Khorsandi.

"Oh goodness, I've just heard about Addison Cresswell a larger than life impresario manager. My deepest sympathy to all his family & friends," remembered a bereft Stephen Fry.