Bo Obama, the Obama family's first Portuguese water dog, celebrated his seventh birthday Friday.

Commonly featured on White House cards and photos, Bo isn't the first furry celebrity to walk the halls of the White House. From Caroline Kennedy's pony to the Clinton family's cat, these are some of the most recent first pets.  

President Obama greets Bo, a Portuguese water hound, outside the Oval Office. The Obama family has another dog of the same breed named Sunny.  (Martin H. Simon-Pool/Getty Images)
George W. Bush salutes his honor guard while holding his dog Barney after leaving Crawford, Texas. (Paul J. Richards/AFP/Getty Images )
Press photographers surround Socks, the cat who belonged to President and Hillary Clinton. (Mike Nelson/AFP/Getty Images )
George H. W. Bush walks on the White House lawn with his English Springer Spaniel Millie and her puppies. One of the puppies, named Spot, later lived in the White House with George W. Bush.  (White House photo)
Ronald and Nancy Reagan are greeted by Rex, their Cavalier King Charles Spaniel, after returning to the White House.  (Wikipedia Commons )
Amy Carter, the daughter of Jimmy Carter, holds her Siamese cat Misty Malarky Ying Yang.  (Wikipedia Commons )
President Lyndon B. Johnson is greeted by his beagles, Him and Her, who were also featured on the cover of Life magazine.  (White House photo)
Caroline Kennedy sits atop her pony named Macaroni on the South Lawn of the White House. The pony was a gift from her father, John F. Kennedy. The Kennedys also had several dogs, birds, hamsters, and a cat.  (JFK Presidential Library)
Richard Nixon and his family walks along the beach with their dog Checkers. Though Checkers never lived in the White House, he is the family's most well-known pet thanks to a televised speech given by Nixon in which he defended accusations of misused campaign funds, saying they would keep Checkers, who was a gift from a supporter. The family had three dogs that lived in the White House during the Nixon administration. (Fox Photos/Getty Images )
Gerald Ford works in the Oval Office next to his golden retriever, Liberty.  (Wikipedia Commons )
Dwight Eisenhower with his Weimaraner named Heidi. The Eisenhowers also had a pet parakeet.  (National Archives )

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