Amanda Seyfried saw Julia Roberts wearing a striped button down and blazer, so she wore a striped button down and blazer.

Indeed, the Mean Girls actress shared that she wanted to raid Julia’s closet after the Pretty Woman star looked chic in dark wash jeans, a navy blazer and a yellow and grey striped button down for the Aug. 29 screening of her upcoming film After the Hunt at the Venice Film Festival, giving a first look at one of the new Versace creative director Dario Vitale's styles. 

Amanda decided to shoot her shot by commenting on their mutual celeb stylist Elizabeth Stewart's Aug. 29 post of the look, saying, "Please let me wear the same outfit."

Three days later, Amanda, 39, expertly copied Julia, 57, by re-wearing her same jeans, blazer and shirt—also at the Venice Film Festival, to celebrate her own movie The Testament of Ann Lee.

And the Mamma Mia! star was nothing but grateful to be able to twin with the Oscar winner, writing on Instagram Sept. 1, "Thanks for sharing @juliaroberts #sustainable #shareyourlooks."

Their stylist also shouted Julia’s good attitude, writing, "Thank you @juliaroberts for your generosity and sustainability. Sharing is caring!"

“Elizabeth is so savvy—she is so amazing and I trust her so much,” she told Harper's Bazaar in 2022. "She understands what will look good on my body and she knows my boundaries with fashion, and I am so grateful for that.”

And this occasion wasn't the first time her fashion consultant was one step ahead.

“Every once in a while—maybe once a year—I’ll see something in a magazine that I want to try, but almost always, it is something she has chosen," she continued, "something she has put on hold, knowing I will love it.”

For more instances when celebs twinned at major events, keep reading.

At the 2023 Met Gala, the Don't Worry Darling and the-then Editor in Chief of Vogue China each honored the late Karl Lagerfeld in the same Chloé dress, in opposite colors.

Olivia then honored the accidental matching moment on her Instagram Story, writing, "Great minds. If you're gonna twin with anyone, make it @margaretzhang."

The models were both visions in orange in their matching Cushnie et Ochs dresses at a 2015 Sports Illustrated event in Nashville.

The Captain Marvel star and White Lotus alum may have styled their polka dotted Dôen gowns differently, but they still made sure to pose together for photos at Filming Italy 2024.

The musical icons proved that hips—and taste—don't lie when they arrived at the 2009 MTV Video Music Awards in the same mini dress from Balmain. 

Thankfully, both parties were floored by the moment, with Pink telling reporters of her twin, "She's hot."

While dressing on theme, these three stars accidentally each picked the exact same dress to wear to the launch of the new Dôen collection in Los Angeles in 2016. 

While Nicole and Minka opted for the white version, Mandy was alone in black. 

At th 2024 EE BAFTA Film Awards, Paul Mescal's sister—a musician in her own right—and the British broadcaster proved they really are just normal people when they accidentally showed up in the same sheer Gucci gown. 

Always down for a joke, the Marvel stars decided to twin (on purpose) to the 2017 premiere of their film Ingrid Goes West. 

While the pair pretended to throw a fit on the carpet, the matching Marc Jacobs dresses were an intentionally twinning moment.

Similarly, for their film You Again, Sigourney and Jamie Lee decided to recreate a moment from their film and "accidentally" wear the same dress to the 2010 premiere.

The two musical legends proved humor never goes out of style when they opened the 1998 MTV Video Music Awards with a prank in custom Vera Wang gowns.

Leaning into the diva persona, the duo feigned fury as they "realized" their one-of-a-kind looks weren't as unique as they'd thought. 

Almost 20 years later, the two actresses decided to recreate the Mariah and Whitney-diva moment when they presented at the 2015 BET Awards.

Though they wore different looks on the carpet, the pair then arrived on stage in matching white gowns. The only way to prove who rocked the look better? A live face-off over hip-hop trivia (which Laverne won).

As they say, the third time is often the charm. At least Dua and Megan hoped it would be when they executed a similar ploy at the 2022 Grammy Awards.

When presenting the award Best New Artist, the artists were "shocked" to see they'd arrived in the same Versace looks—only to have Donatella Versace herself take to the stage and tell them to cool it. 

The Bridgerton star and social media personality accidentally rocked the same sleeveless, yellow suede dress to the Glamour Women of the Year Awards in Oct. 2024. 

When it came to "An Evening Honoring Valentino" at Lincoln Center in 2016, Nicky and the fashion designer each arrived in the same Valentino ensemble.  

But for Nicky, this wasn't the only time her fashion choices landed her a twin. 

In fact, five years earlier she and the White Chicks actress both donned the same leopard print dress to the UK Style by French Connection fashion launch party in Hollywood. 

When these two stars arrived at a party in 2016, they found themselves dressed almost identically. Thankfully, they decided to make the most of it with this twinning photo. 

During the 2017 premiere of Loveless at Cannes Film Festival, the Russian actress Svetlana and French model Thylane accidentally arrived in the same Dior gown. 

For the latest breaking news updates, click here to download the E! News App