This one's for the dogs. The very famous, well-groomed dogs.

As part of a beautiful photography book series called Rover Works, those who can afford a price tag in the thousands pay to have their pup pose for a studio portrait to be featured in the book. Proceeds are given to animal rescue operations across America and, so far, the project has raised $1 million.

The project is the brainchild of photographer Andrew Grant, who has been living on the road with his girlfriend Amanda and their Chihuahua, Riley, for the past two and a half years. They meet with shelter dogs, set up a portable studio, and make portraits to help find them loving homes, before moving on to the next city. To date, they have self-published 4 books and are currently working on the 5th edition.

A number of particularly famous celebrity dogs have already appeared on their pages—see if you can guess which dog belongs to which celebrity!

Answer Key:

1) Steven Spielberg,  2) Ewan McGregor, 3) Heidi Klum, 4) Mario Lopez, 5) Jamie Lynn Sigler

When participants make a $5000-$50,000 donation to have their dog included in the book, they make a donation to one or multiple rescues that Rover Works partners with. They also donate books to Children's Hospitals for kids in isolation that can't have pet therapy visitors.

Photos: RoverWorks

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