Jennifer Aniston's 2017 Oscars gown was previously worn by Jennifer Lopez

If Jennifer Aniston's plunging, thigh-high Versace gown at the 2017 Oscars looked familiar to you ... it's because you've seen it on another star of the same first name!

The 48-year-old actress, who introduced the show's In Memoriam segment, was an absolute vision in the sparkly, beaded number. However, she didn't wear it first -- that honor went to Jennifer Lopez.

The pop diva wore the same semi-sheer gown during a performance with Marc Anthony at Radio City Music Hall in New York City last summer.

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And while the Jennifers have us seeing double, they did choose to accessorize differently.

Lopez paired the dress with cross-strap pumps and simple dangling gold earrings, while Aniston topped off her look with more than $10 million (!!!) worth of Lorraine Schwartz diamonds. She also added a sheer panel to the plunging neckline, making it a bit more modest for the Oscars.

The actress sure does love her black dresses because she sported a gown with a similar silhouette to the same event in 2000. The "Friends" alum wore a gown with the same deep-V neckline. The main difference? Her husband at the time, Brad Pitt, was her hot date for the night. She showed up to the show with her now-husband Justin Theroux this time around.

But she wasn't the only Hollywood star flash flesh on Sunday night ... check out all the hot looks at the Vanity Fair Oscars after party in the slideshow below.