Mark Zuckerberg's daughter said her first word, and the Facebook post is adorable

PALO ALTO, Calif. – Mark Zuckerberg revealed his daughter's first word in a Facebook post Wednesday that included a photo of 1-year-old Max and her canine best pal, Beast.

"Max loves Beast," Zuckerberg wrote in the post. "Her first word: dog."

Fittingly, the photo shows the 1-year-old petting Beast, a Hungarian sheepdog called a Puli.

Mark and wife Priscilla got Beast five years ago, and, with his mop of hair and formidable Facebook following (over 2 million likes), the Silicon Valley pup is a social media star in his own right.

Beast has been sharing the spotlight with young Max for a year now, and it seems like the two are getting along just fine.