The backstage area at Madison Square Garden is a flurry of activity, as pampered prima donnas are given a last-minute cut and blow-dry before they walk the runway. But this isn't New York Fashion Week; it's America's biggest dog show.

From Afghan hounds and Affenpinschers to Xoloitzcuintlis and Yorkshire Terriers, more than 2,700 dogs in 192 breeds are vying to be top dog at the Westminster Kennel Club Dog Show.

Westminster Kennel Club dog show 2015
A Komondor is groomed on the second day of competition at the Westminster Kennel Club Dog ShowTimothy A Clary/AFP
Westminster Kennel Club dog show 2015
Another photo of the Komondor being groomed (because one just isn't enough)Timothy A Clary/AFP
Westminster Kennel Club dog show 2015
A standard poodle named Paris has his hair doneSpencer Platt/Getty Images
Westminster Kennel Club dog show 2015
An Afghan houndTimothy A Clary/AFP
Westminster Kennel Club dog show 2015
A Maltese is prepared for its big momentTimothy A Clary/AFP
Westminster Kennel Club dog show 2015
Lana, a standard poodle, waits on a table in the grooming areaMike Segar/Reuters
Westminster Kennel Club dog show 2015
A Chinese crested dogTimothy A Clary/AFP
Westminster Kennel Club dog show 2015
A shih tzuTimothy A Clary/AFP
Westminster Kennel Club dog show 2015
A toy poodle gets groomedTimothy A Clary/AFP
Westminster Kennel Club dog show 2015
A Welsh terrier stands on blocks during the grooming processTimothy A Clary/AFP
Westminster Kennel Club dog show 2015
An Italian greyhoundTimothy A Clary/AFP

In its 139th year, the show is the second-longest continuously running sporting event in the United States, behind the Kentucky Derby horse race.

Judges select the best of each breed and group, divided into seven categories – hound, toy, non-sporting, herding, sporting, working and terrier.

Westminster Kennel Club dog show 2015
A woman sits with her dogs during a Meet the Breeds event at the 139th Westminster Kennel Club Dog ShowCarlo Allegri/Reuters
Westminster Kennel Club dog show 2015
A woman sleeps next to a dog in the benching areaMike Segar/Reuters
Westminster Kennel Club dog show 2015
Karen and John Pacino sit with their Great DaneTimothy A Clary/AFP
Westminster Kennel Club dog show 2015
Murphy, a bulldog from San Francisco, waits to be judgedMike Segar/Reuters
Westminster Kennel Club dog show 2015
A handler and a bloodhound in the judging areaTimothy A Clary/AFP
Westminster Kennel Club dog show 2015
Old English sheepdogs are lined up for judgingTimothy A Clary/AFP
Westminster Kennel Club dog show 2015
A Bichon Frise is walked in the ring during competition in the non-sporting groupMike Segar/Reuters

On the first day of the show, a beagle named Miss P won the hound group, a shih tzu called Rocket won the toy group, a standard poodle named Flame won the non-sporting group, and an Old English sheepdog named Swagger won the herding group. Sporting, working and terriers are judged on the second day.

The seven dogs selected as the best in their groups compete for the ultimate Best In Show prize. The winner gets a trophy and embarks on a media tour. In last year's show, a wire fox terrier named Sky won Best In Show, making it the record 14th time that breed took the prize.