Hillary Clinton prepares to sign copies of her new memoir 'Hard Choices' at a Costco store in Arlington, Va, June 14, 2014.
Jim Lo Scalzo/EPA

Sonia Sotomayor greets Hillary Clinton at book signing

Updated

Hillary Clinton got a unexpected visit from Supreme Court Justice Sonia Sotomayor Saturday during a book signing at a Costco in Virginia.

“I don’t believe this,” Clinton told Sotomayor as they embraced, according to NBC News’ Alex Moe.

Sotomayor told reporters she was “just shopping” at the the bulk store. 

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Clinton signed copies of her newly released memoir, “Hard Choices,” for more than three hours, according to NBC News.

The former secretary of state has been busy promoting her book, which hit shelves Tuesday. A large crowd turned out on release day in New York City for a chance to snag just a few seconds with Clinton, who is considered a likely Democratic presidential contender in 2016.

But the first week of the rollout of Clinton’s book has not been entirely smooth sailing. Clinton has made several missteps, including saying that she and former President Bill Clinton were “dead broke” upon leaving the White House and a testy exchange over gay marriage with National Public Radio host Terry Gross.

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Sonia Sotomayor greets Hillary Clinton at book signing

Updated