Gus, Michael J. Fox’s ‘Wonderful Dog and Faithful Companion,’ Has Died: ‘We’ll Miss You,’ He Says.

In his memoir, Michael J. Fox referred to Gus as a “miracle dog” because he was a consistent source of comfort during his long battle with Parkinson’s disease.

Gus, Michael J. Fox’s beloved dog, has died.

The 59-year-old Back to the Future star revealed the terrible news, sharing a photo of the 12-year-old pup on Instagram.

“Gus – fantastic dog and faithful buddy, we’ll miss you,” he said in the caption before referring to many passages from his upcoming memoir, No Time Like the Future: An Optimist Considers Death, which will be released in 2020.