A dog widely considered to be the world's cutest has died a year after his canine companion of what his owner believes to be a broken heart.
The news that Boo the Pomeranian had died was broken on the fluffy pooch's social media accounts to his 17.5m followers.
The adorable dog died just over a year after best-friend Buddy, prompting owner Irene Ahn to speculate he had succumbed to sadness.
A post made to his 541,000 Instagram followers early on Saturday morning read: "Shortly after Buddy died, Boo showed signs of heart issues.
"We think his heart literally broke when Buddy left us. He hung on and gave us over a year.
"But it looks like it was his time, and I’m sure it was a most joyous moment for them when they saw each other in heaven."
Boo became friends with Buddy when the thoroughbred joined Irene's San Fransisco home in 2006.
The pair became inseparable and were happiest when posing for photographs with one another.
Channelled through his owner - who works at tech giant Facebook - Boo's first post to the world simply said: "My name is Boo. I am a dog. Life is good."
He shot to stardom in October 2010 when singer Kesha sent a Tweet that she had a new boyfriend, linking to the page.
Noticing Boo's then five million followers, Chronicle Books asked Irene to write a picture book featuring some of his cutest snaps.
'Boo: The Life of the World's Cutest Dog' would go on to be published in ten languages and be followed by 'Boo: Little Dog in the Big City'.
Remembering some of the qualities that made him so popular, the adorable pup's owners wrote: "Boo brought joy to people all over the world.
"Boo is the happiest dog I’ve ever met. He was so easy going that we never had to bother with training.
"He made the manliest of men squeal with delight over his cuteness and made everyone laugh with his quirky, tail wagging personality.
"Over the years Boo met some super cool people, a lot of crazy talented people, but most of all so many kind people..."
Featured in his star studded fan base were news anchor Anderson Cooper, One Direction singer Liam Payne and fashion designer Tory Birch.
The 12-year-old dog was not one to be swept up by the glitz and glamour his stardom offered however, enjoying a simple mix of chicken, cheese, flowers, grass and dirt for dinner and taking part in shirt wearing - his favourite past time.
The statement continued: "Our family is heartbroken, but we find comfort knowing that he is no longer in any pain or discomfort.
"We know that Buddy was the first to greet him on the other side of that rainbow bridge, and this is likely the most excited either of them have been in a long time.
"Boo, we love you with all our hearts and will miss you until the day we meet again. Have fun running around with Buddy and creating adorable mischief wherever you guys go.
"Thank you to all of you for following along on their silly adventures over the past 10 years. They sure had a LOT of fun."
Irene went on to thank Adobe Animal Hospital and Sage Veterinary Centers for looking after Boo and Buddy.