Boo, ‘world’s cutest dog,’ dies aged 12

Boo, the “world’s cutest dog,” has died at 12 years old, his owners announced on Facebook.

“With deepest sadness I wanted to share that Boo passed away in his sleep early this morning (Jan. 19) and has left us to join his best friend, Buddy,” Boo’s humans—as they call themselves—wrote in a tribute on the Facebook page, which has over 16 million followers.

Pomeranian dog Boo and his companion Buddy, who died last year, became internet sensations when their owners started sharing pictures of their adorable antics on social media. The owner has said that Boo died from a broken heart, following Buddy’s death.