Have you ever fantasized about befriending your favorite celebrity ... namely so you could tap into her stylist-curated, designer-studded wardrobe?

With one Instagram photo, Hilary Duff proved she is indeed that friend, thus cementing our girl crush forever.

"Memoirs of a traveling dress," Duff captioned a photo of herself and two friends wearing the same Raquel Allegra gown. "Love you ladies and I'm happy to share a dress with all of you."

Hey now, hey now! This is what BFF dreams are made of.

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And is that a "Sisterhood of the Traveling Pants" reference? If so, can someone please make sure Blake Lively sees it? Perhaps she'll feel inspired to let us raid her closet as well.

It would be unfair to pigeonhole Duff as Lizzie McGuire, her breakout role more than half her lifetime ago. But we're glad the real-life Duff, now 29, is every bit as relatable.

Last month, Duff talked to TODAY Style about her risk-taking fashion philosophy. "I think there are no rules right now and that's what's really fun about fashion," she said.

She also revealed her awesomely realistic attitude about fitness and physical appearance.

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"I have the same troubles as every woman; I'm constantly in that 10-pound struggle," she said. "But it's not something I obsess over. Sometimes it's more realistic for me to be in shape than it is other times. I love to work out, and I love to feel strong, but I also really enjoy eating, and I love nights out with friends."

"Putting so much pressure on ourselves ... is just a waste of energy," Duff continued. "There's such a focus on things we think are our flaws instead of what makes us beautiful."

Amen. And please put us on the list for your next girls' night!