Blake Lively cuddles her adorable Maltipoo Penny on the NYC set of 'Gossip Girl' on March 27, 2008.
Click through our gallery and choose which star has the cutest pooch!
Nick Jonas spends time with his Golden Retriever in Hollywood on Feb 21, 2009. Elvis the dog was a gift Nick received for his 16th birthday.
Reese Witherspoon carries her French Bulldog Coco Chanel outside the Fred Segal store in Santa Monica on July 19, 2008.
Teen star Miley Cyrus takes a walk with dad Billy Ray and their dogs in Hollywood on April 12, 2009. German Shepherd Texas and Labrador/Beagle mix Fluke seem to be enjoying their outing!
Rihanna shows off her Maltipoo puppy DJ Oliver in Hollywood on April 4, 2008.
His beloved pet Loki may have passed on, but Mickey Rourke has Chihuahua Jaws to make him smile. The pals hang out at LAX airport on March 30, 2009.
Paris Hilton takes one of her many Chihuahuas along to a photoshoot at Smashbox Studios in Culver City, California on June 12, 2009.
Nicollette Sheridan leaves Cross Creek in Malibu September 9, 2009 with her gorgeous Golden, Oliver.
LeAnn Rimes carries her Pomeranian, Virgo, around Santa Monica on August 12, 2009. LeAnn also has a Chihuahua, who she rescued from shelter in September.
Rachel Bilson and Thurman Murman head out for errands in Hollywood on August 6, 2009.
Matthew McConaughey goes for a run in Malibu on September 6, 2009 and gets a playful bite from his little dog B.J.!
Paula Abdul carries her Chihuahua Tulip around Beverly Hills on January 8, 2009.
Ashlee Simpson-Wentz carries English bulldog pup Rigby to visit a friend in L.A. on July 25, 2008. Her husband, Pete Wentz, is into English Bulldogs and his dog Hemingway was the ring bearer at their wedding!
Natalie Portman runs around NYC with Charlie on November 18, 2008.
Sienna Miller walks her dog Bess in NYC on October 5, 2009. The starlet also owns pup Porgy; the two dogs were gifts from ex-fiance Jude Law.
Mariah Carey carries her Jack Russell, Jack, around Aspen on December 22, 2008. Jack has his own fan club!
Kelly Osbourne hangs with her baby Shiba Inu in Hollywood on November 18, 2008. Kelly also has a Bulldog, among her other dogs.
Mischa Barton leaves Kaufman Studios in Astoria, NY with her mixed-breed Charlie after a shoot for cancelled series 'Beautiful Life' on July 30, 2009. Mischa also owns pup Ziggy.
Kirsten Dunst walks her scrappy pooch in Hollywood on September 3, 2008.
Julia Roberts walks her two black dogs in Malibu on January 14, 2009.
Jake Gyllenhaal takes his 'puggle' (pug and beagle mix) Boo Radley to the dog park in Hollywood on January 4, 2006. Jake also owns a Grman Shepherd, Atticus, not pictured.
Ashley Greene carries her toy Fox Terrier Marlow in Vancouver, where the actress is shooting ‘Twilight’ flick ‘Eclipse,’ on August 22, 2009.
Kate Beckinsale totes her tiny pup in Brentwood, California on July 6, 2008.
Jerry O'Connell takes his pack of dogs to get groomed at the Calabasas Veterinary Clinic on August 28, 2009.
Hilary Duff runs some errands in Beverly Hills with her pooch on April 10, 2009. Hilary took her Bernese Mountain Dog for some puppy treats and kissed him on the mouth, according to bystanders. That’s love!
That pooch is bigger than she is! Eva Mendes takes Belgian Malinois Hugo to painting class in Beverly Hills on July 7, 2009.
Drew Barrymore goes out with rescue dog Flossie in LA. on April 3, 2009. Flossie saved Drew's life in 2002 when her house caught fire. Flossie’s barking and clawing at the door got Drew and then fiance Tom Green out of the burning home.
English Bulldog aficionado Adam Sandler hangs out at a Malibu beach with Babu on Nov 4, 2008.
Ashley Tisdale shows off maltipoo Blondie at LAX on September 12, 2008.
Charlize Theron walks her dogs on the beach in Malibu on August 16, 2009. Also among Theron’s menagerie: Cocker Spaniels Delilah and Denver.
Hollywood's most pampered pooches and their canine-loving star owners