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Call it puppygate!

Malia and Sasha Obama got their pooch on Saturday -- but the White House was doing its best to keep the information from leaking until they planned to announce it Tuesday.

TMZ.com first reported the dog's name as Charlie -- but said the Obamas would change it. The Washington Post confirmed today the six-month-old Portuguese water dog will be called Bo.

See photos of stars with dogs!

The Post reports the girls chose the name because their cousins have a cat named Bo and because Michelle Obama's father was nicknamed Diddley.

The pup came from the same Texas kennel from which Senator Ted Kennedy bought his three Portuguese water dogs, or Porties. The Senator helped facilitate the "re-homing" of this pooch, who was purchased and then returned by another family.

See the Obama family album.

(As for the promise the Obamas made to adopt a dog from a shelter? The Post says they'll make a donation to the D.C. Humane Society.)

"We couldn't be happier to see the joy that Bo is bringing to Malia and Sasha. We love our Portuguese Water Dogs and know that the girls -- and their parents -- will love theirs too," the Kennedys said in a statement.

Check out photos of first children.

The Obama girls first met their dog a few weeks ago in a visit known around the White House as "The Meeting." The well-behaved puppy -- who obediently followed the president around the room -- wore a lei to surprise Malia, 10, and Sasha, 7.

"He's sooooo cute," a source told the Post. "It's very exciting. They had a great meeting."

Sasha was excited, Malia was focused on the "responsibility issues" -- Bo's training, who will care for him.

"Malia has done extensive research," the source said.

Feeding and walking schedules are still being settled on -- a "family decision," the source said. "They're approaching this responsibly as a family."