Blake Lively is raiding her Upper East Side archives.

The actress pulled a pair of throwback red patent leather Chanel heels — shoes she’s held onto since 2009, right in the middle of her “Gossip Girl” reign — for an event on Tuesday celebrating her Betty Booze brand.

“Big shout out to @eliesaabworld for making me feel so fancy … and to me for being a hoarder and keeping these gorgeous Chanel shoes since 2009. :)” the 38-year-old wrote on Instagram .

The almost-vintage pumps featured rows of crisscrossing straps and four buckles, along with a gold quilting detail on the heel mirroring the brand’s iconic handbags.

The footwear — which would have been right at home on the feet of Serena van der Woodsen — coordinated perfectly with her head-to-toe red Elie Saab look, a broderie anglaise

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