Freddy was a Great Dane who became the Guinness World record holder when he stood at the height of 7 feet 5 inches. The UK's gentle giant became worldwide famous because of his mammoth size, weighing up to 15 stone.
The dog is owned by Claire Stoneman from Essex and spent most of his life with her.
Claire recalls, "He was not just the tallest dog but the dog with the most love and the biggest heart."
Dilantha Dissanayake / Caters News Agency
Sharing the heartbreaking news on social media, Claire wrote, "He was my life. My reason. My joy. My annoyance. My happiness and my ultimate sadness. He was my heart Dane. My one in a million and loved by the entire world."
"There’s a hole that can’t be filled. Fly high my amazing big brave boy."
Dilantha Dissanayake / Caters News Agency
Claire also shared about her first meeting with the boy, "As a puppy, he was the runt of the litter. I actually got him a couple of weeks earlier than I should have, as he wasn't feeding off mum. I had no idea he was going to get this big at all."
The family celebrated the dog's eighth birthday last year in May with his friend, Erin, a seven-year-old girl. They had cakes, balloons, and a lot of treats for the happy dog!
RIP, Freddy.
Dilantha Dissanayake / Caters News Agency
Freddy's monthly food can cost Claire up to £500, consisting of kibble, minced beef, chicken roast, and lots of treats.
Craig Glenday the editor-in-chief also shared her memories of Freddy.
"Freddy was such a gentle giant, and it was always a pleasure to see him bounding towards you," he said. "Measuring this mountain of a dog was an unforgettable - if challenging - experience and I'll always treasure the couple of occasions I got to share a sofa with him - there was just about enough room for the two of us!"
"'I still can barely believe that he was the runt of the litter. Freddy brought a smile to everyone's face and will be missed by everyone at Guinness World Records."
"I'm just pleased that we got the chance to celebrate his record-breaking immensity in the books and share his story with millions of people around the world."
