30 Celebrity Look-Alikes That'll Blow Your Mind, Including Cillian Murphy and Pitcher Tyler Glasnow

We all know there are plenty of celebrity kids who bear striking resemblance to their parents and actual sets of twins in Hollywood, but some of the best star "twins" aren't related at all. Every now and then, a pair of unrelated superstars look so much alike that you'd be forgiven for confusing them — and if you've ever done a double take while looking at Bella Hadid and Jennifer Lawrence, Zac Efron and Kevin Zegers, or Nina Dobrev and Victoria Justice, we've got the ultimate treat for you.

Few stars look more uncannily alike though than Margot Robbie and Emma Mackey, who both star in the summer's most anticipated film, "Barbie." As it turns out, their resemblance is part of why Mackey was cast at all. "I've been getting told for years that I look like the girl from 'Sex Education,' who is Emma Mackey," Robbie told Buzzfeed in a July 9 interview. "She plays one of the Barbies in the movie pretty much because Greta and I thought it would be funny," she continued. "We were gonna do this whole joke about us looking similar."

In costume, however, the duo didn't end up looking as much alike as Robbie and Gerwig thought they would, so no jokes about their resemblance made it into the film. "Once we got all dressed up as our Barbies, we were kind of like, 'We don't actually look that similar,'" Robbie said. "Like, when she's got her brown hair and I've got my blonde hair, we don't look that similar, so we didn't put that joke in the movie." Still, Robbie noted that fans do frequently mistake her for Mackey in the real world. She added, "When people come up and say, 'I loved you in 'Sex Education,'' I just say, 'Thank you. Thank you so much.'"

And the other half of "Barbenheimer" — "Oppenheimer" — is anchored by Cillian Murphy, who also has a major celebrity look-alike: Tampa Bay Rays pitcher Tyler Glasnow. They look so much alike that even the Rays's Twitter account joked about it, posting a photo of Glasnow and writing, "[One] Ticket for Oppenheimer, please."

Of course, these duos are far from the only celebrity doppelgängers out there in the world. Keep scrolling to see some of the most mind-bogglingly, similar-looking stars who could totally pass as siblings.

01
Cillian Murphy and Tyler Glasnow
Getty | Jed Cullen / Dave Benett / Julio Aguilar

Cillian Murphy and Tyler Glasnow

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Taylor Swift and Karlie Kloss
Getty | Jon Kopaloff Karwai Tang

Taylor Swift and Karlie Kloss

04
Harry Styles and Charlie Heaton
Getty | Theo Wargo / John Shearer

Harry Styles and Charlie Heaton

05
Kit Harington and Christopher Abbott
Getty | Dan MacMedan / Rommel Demano

Kit Harington and Christopher Abbott

06
Abigail Breslin and Chloë Grace Moretz
Getty | Jason Merritt

Abigail Breslin and Chloë Grace Moretz

08
Kevin Zegers and Zac Efron
Getty | Gregg DeGuire / Jon Kopaloff

Kevin Zegers and Zac Efron

09
Nina Dobrev and Victoria Justice
Getty | Axelle; Getty / Christopher Polk

Nina Dobrev and Victoria Justice

10
Minka Kelly and Leighton Meester
Getty | Gregg DeGuire

Minka Kelly and Leighton Meester

11
Camila Mendes and Phoebe Tonkin
Getty | Emma McIntyre / Dia Dipasupil

Camila Mendes and Phoebe Tonkin

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Sarah Hyland and Mila Kunis
Getty | Don Arnold Gregg DeGuire

Sarah Hyland and Mila Kunis

16
Zooey Deschanel and Katy Perry
Getty | Jesse Grant

Zooey Deschanel and Katy Perry

17
Rachel Bilson and Selena Gomez
Getty | Jon Kopaloff Venturelli

Rachel Bilson and Selena Gomez

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Will Arnett and Patrick Wilson
Getty | Gregg DeGuire Michael Loccisano

Will Arnett and Patrick Wilson

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Emma Watson and Kiernan Shipka
Getty | Jon Kopaloff / Daniele Venturelli

Emma Watson and Kiernan Shipka

20
Mark Wahlberg and Matt Damon
Getty | Jim Spellman Don Arnold

Mark Wahlberg and Matt Damon

22
Javier Bardem and Jeffrey Dean Morgan
Getty | Mike Marsland; Getty / Jesse Grant

Javier Bardem and Jeffrey Dean Morgan

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Amanda Peet and Lake Bell
Getty | Amanda Edwards Jason LaVeris

Amanda Peet and Lake Bell

24
Zachary Quinto and Eli Roth
Getty | Jim Spellman Gabriel Olsen

Zachary Quinto and Eli Roth

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Amber Heard and Scarlett Johansson
Getty | David Livingston Rindoff Petroff

Amber Heard and Scarlett Johansson

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Josh Holloway and Nikolaj Coster-Waldau
Getty | Taylor Hill Steve Jennings

Josh Holloway and Nikolaj Coster-Waldau

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Helen Hunt and Leelee Sobieski
Getty | Michael Tran D. Dipasupil

Helen Hunt and Leelee Sobieski

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Jaime Pressly and Margot Robbie
Getty | Steven Lawton Jeff Vespa

Jaime Pressly and Margot Robbie

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Jennifer Lawrence and Bella Hadid
Getty | Jeff Vespa / Daniele Venturelli

Jennifer Lawrence and Bella Hadid