George Clooney's pup Millie poses for Casamigos

The latest brand ambassador for George Clooney's tequila company is none other than his adorable pooch, Millie.

An image of the floppy-eared basset hound appeared on Casamigos's Instagram page on Tuesday (Jan. 5). The photo shows the rescue pup posing on a rug in what could be a kitchen and donning a black branded baseball cap that sports the company's logo.

There are reports the 54-year-old actor is the mastermind of the picture though the Gravity star's business partner Rande Gerber could also have snapped the shot.

The accompanying caption is simple and sweet: "George’s dog Millie was adopted October 28th 2015 and has jumped right into our #HouseOfFriends boyyyy! #DogHouseOfFriends"

Four-year-old Millie joined George and Amal's expanding family after she was found begging for food scraps outside a San Gabriel-based restaurant. The newlyweds fell in love with her during a visit to the San Gabriel Valley Humane Society and couldn't leave her behind.

Mille is the latest addition to the Clooney clan.

"Millie found her forever home and the Clooneys have a new best friend," Jennifer Clarke, a worker at the shelter, told PEOPLE after the adoption. "They all left together as one big happy family!"

The star and the 37-year-old lawyer also have two cocker spaniels named Louie and Einstein.

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