Jennifer Garner has just gone under a rough separation with long-time husband Ben Affleck. After months of hiding from the public, Garner has been spotted hanging out with A-listers last Friday.

According to Huffington Post, Garner attended a party in Santa Monica. The event called "Think It Up" was arranged by the Entertainment Industry Foundation to raise money for public school projects.

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Garner appeared with all smiles and a casual tee as she bonded with other Hollywood philanthropists like Paltrow, Jessica Biel and Justin Bieber.

The event got more interesting when Garner and Paltrow hung out since both of them dated Affleck. Paltrow dated the "Batman" star from 1997 to 2000, according to ET Online.

Paltrow did not seem to have any bitterness toward Garner and Affleck. In an interview with Howard Stern this year, Paltrow revealed that her parents were very appreciative of Affleck.

"[He] is super intelligent, and he's really, really talented and he's funny. But he wasn't in a good place in his life to have a girlfriend so I think they were okay with-they loved him-but they were okay with us not being [together]," said Paltrow.

Nonetheless, Paltrow is still very close friends with Garner.

"I like him, I'm friends with him still. He settled down and his wife is awesome. Not only is she beautiful, but she's so warm and she cooks and is so into her kids -- she's really great and she's hilarious," she said of Garner. "I had a girls' dinner before the summer and she came over, she's my neighbor. I really like her a lot."

TagsJennifer Garner, Ben Affleck, Jessica Biel, Justin Bieber, Gwyneth Paltrow