Jennifer Garner was all smiles on Oscar night.

Days after her tell-all Vanity Fair interview -- in which she opened up about her split from her husband of 10 years, Ben Affleck -- was published, the actress hit the mag's iconic post-Oscar party with friends... and her ex.

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Things seemed far from awkward inside the soiree, with photogs snapping the 43-year-old stunner looking happy and relaxed as she socialized with a group that included Affleck, an eyewitness told ET. Garner made her exit around 1 a.m., heading to the valet stand with a female friend and mystery guy, the eyewitness added, noting that Affleck left separately, about 15 minutes later, and was spotted with Kate Hudson. In the end, the Batman v Superman: Dawn of Justice actor appeared to head home alone.

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Earlier that night, on the red carpet, Garner's Alias co-star, Victor Garber, confessed that the mother of two still has "great love" for the father of her children.

"She's dealing with a lot of stress and pain, and dealing with it in, I think, a magnificent way," Garber, who officiated Garner and Affleck's 2005 wedding ceremony, told ET.

"I've always found her to be incredibly authentic. It's part of why people, I think, are drawn to her, because she is real," he gushed. "She also has a great capacity for love. You know, her children are her passion. And so, all that said, she's dealing with the situation, I think, miraculously."

See the interview in the player below.

WATCH: Victor Garber Says Jennifer Garner Is Dealing With Ben Affleck Breakup 'Miraculously'