Neville Jacobs and his owner, Marc Jacobs [Photo/Instagram @NevilleJacobs]

The four-year-old bull terrier is the beloved dog of Marc Jacobs and has nearly 200,000 followers on Instagram. Aside from his good taste and broad fashion sense on Instagram, he's posed with supermodels such as Christy Turlington and Kendall Jenner, and has "worked" as a guest editor of Love magazine as well as a brand ambassador.

Lady Gaga and her French bulldog, Asia [Photo/Instagram @Missasiakinney]

Another celebrity dog living a fabulous life is Lady Gaga's Asia. The adorable French bulldog wears luxurious pearls, travels in private jets, carries an Hermès bag and even drinks dog wine. She frequently accompanies Lady Gaga to big events and joined a fashion campaign for Coach.

Cara Delevingne and her rabbit, Cecil [Photo/Instagram @Cecildelevingne]

It's not all cats and dogs, of course. British supermodel Edie Campbell's horse Dolly made her fashion debut with her owner in Lanvin's autumn/winter 2014 campaign. Supermodel Cara Delevingne's bunny rabbit Cecil is also a new power in the fashion world; she visited Mulberry's headquarters, wears Chanel jewellery, works with Cara and has taken photos with every celebrity you could think of.