Alec Baldwin walks out of his apartment building carrying two dogs in New York City on Nov. 15, 2013.
Steven Seagal looks at Grivei, a stray dog he adopted from the Dogtown kennel in Uzunu, 24 miles south of Bucharest, Romania, on Nov. 17, 2013.
Actress Fran Drescher arrives with her dog at the 20th annual Elton John AIDS Foundation Academy Awards Viewing Party in West Hollywood, Calif., on Feb. 26, 2012.
Actress and singer Jordin Sparks poses with her dog Minnie in Los Angeles, Calif., on Aug. 3, 2012.
Actress Lauren Bacall poses with her dog, Sophie, during a photo call at the 57th Berlinale International Film Festival in 2007.
Actor Mickey Rourke arrives with his dog, Loki, for the award ceremony of the Venice Film Festival, Sept. 6, 2008. Loki died in February 2009 at the age of 18.
President Barack Obama is welcomed back to the White House by his daughters and their dog, Bo.
Elizabeth Taylor leaves the CNN Studios after an appearance on "Larry King Live" in Los Angeles on May 30, 2006.
Actress Tori Spelling poses with dog Mimi LaRue and actress Loni Anderson.
Bill Maher, his girlfriend and their dog after ceremonies unveiling his star on the Hollywood Walk of Fame.
Paris Hilton and her dog, Tinkerbell.
Paula Abdul and her dog, Thumbelina.
Nicole Richie and her dog, Honeychild.
Tennis champs Venus and Serena Williams with their dog, Jackie.
Actor Richard Belzer arrives for the Kennedy Center's Mark Twain Prize for American Humor Gala in Washington, Nov. 10, 2008.
U.S. President George W. Bush and his dogs, Spot and Barney, walk together toward the Oval Office upon Bush's arrival on the South Lawn of the White House, Jan. 16, 2003. Spot, the daughter of President George H.W. Bush's dog, Millie, was put to sleep in February 2004 at the age of 15 after a series of health troubles.
President George W. Bush and Laura Bush with Miss Beazley. She was a birthday present from the president to Mrs. Bush.
Elton John and his dog, Arthur, in November 2003.
Former U.S. Olympian Greg Louganis holds his Jack Russell terrier, Dolby, in the agility (small dog) event at the Incredible Dog Challenge at Purina Farms in Gray Summit, Mo., Oct. 3, 2009.
Actress Ashley Judd walks her dog, Buttermilk, at the Indianapolis Motor Speedway in Indianapolis, Ind., May 28, 2007.
Television host Star Jones holds her dog, Pinky, as they walk the runway at the HollyRod Foundation's 2006 Gridiron Glamour Fashion show in Dearborn, Mich., Feb. 4, 2006.
Kelly Osbourne, left, introduces her dog, Fanny, as she and her mother Sharon Osbourne announce the winner of the Choice R&B Artist award during the 2004 Teen Choice Awards at the Universal Ampitheatre in Los Angeles on Aug. 8, 2004.
Singer Britney Spears arrives with her dog at the MGM Grand Garden Arena for the 2004 Billboard Music Awards in Las Vegas on Dec. 8, 2004.
Singer Chris Isaak poses holding his dog, Rodney, at the 2009 MTV Movie Awards in Los Angeles.