YouTube star Angry Grandpa has died on Sunday at the age of 67.

The wildly popular internet personality, who had almost 3.5 million YouTube subscribers, was famed for his cantankerous demeanour and his videos centred round him reacting to his son Michael Green’s pranks.

His son Green announced the news of his death in a poignant YouTube video in which he becomes overwhelmed with emotion and openly sobs in front of the camera.

“Today I’ve got to make a very unfortunate video. I’ve never wanted to make this video. Today we lost angry grandpa,” he told viewers in a video which has already amassed over 1.1 million views.

“Maybe I should not be filming this right now because it just happened but I respect him too much to hide how I feel from the internet. People are going to make fun of me for crying and that’s okay. I’ll take it because if he’s out there somewhere I hope he can hear me.”

“So earlier in this year grandpa was diagnosed with cancer and he beat it and we were so happy we were like ‘man 2016 is going to be great’. In July he was diagnosed with cirrhosis of the liver which we thought was early stage but it turns out it was end stage.”

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Green said his father's health had steadily deteriorated since July but he had managed to come home for Thanksgiving but things again went downhill from there.

“Everything looked like it was going great and he got to come home and that is where he died," he said.

Green also announced the news of his father’s death in a statement on Twitter, saying: “Heaven just got a whole lost angrier. Dad, I’m going to miss you more than I even understand as I write this.”

He added: “I already miss you more than you’ll ever know. I’m so sorry that you couldn’t enjoy your fame longer but I’m so happy that the last 10 years of your life had a purpose.”

The YouTuber, whose real name was Charles Marvin Green Jr, carved out a loyal fanbase over the years and found his popularity had longevity. His videos were featured on everywhere from Channel 4's RudeTube to MTV's Pranked and many more.

His YouTube channel “TheAngryGrandpaShow” clocked up almost nine million views and his fanbase was known as “Grandpa's Army”. He affectionately called them “youngins”.

The vlogger, who was raised in Charleston, South Carolina, credited YouTube with managing to transform him from being an “800 pound alcoholic and distant father” to keeping his days busy, giving him purpose and making him be more conscious about his health.

He also had his own personal YouTube channel named “Grandpa's Corner” where he told tales about his life and even made cooking videos.

In July 2015, the father and son duo made headlines after the latter surprised Angry Grandpa with a house and made him break down in tears.

“For the past few months, Bridget and I have been planning a huge prank on Angry Grandpa,” Michael told the camera. “We’ve been taking my dad house-hunting with us under the pretence that he’s looking for a house for me and Bridget. The only problem is, he’s been looking for his own. Dad – I got you a house.”

This is followed by Angry Grandpa strolling around the house in utter awe and remarking on how brilliant it will be for his son and daughter-in-law.

After a few minutes of showing his dad the house, his son says: “I have something to confess – we’re not searching for a house for us.”

After Angry Grandpa says, “Then what the hell we doing here?” he reveals, “This is your house, Pop.”

Tributes to Angry Grandpa have poured in on social media. Actor Roseanne Barr tweeted: “God Bless you grandpa we will always love u!”.