Katy Perry, 36, casts look-alike Zooey Deschanel, 40, in her new music video

Katy Perry reached out to an old friend, Zooey Deschanel, to star in her new music video End Of The World, which debuted on Monday.

Fans did a double take over the strikingly similar looks between the 36-year-old I Kissed A Girl pop star and the 40-year-old New Girl actress.

Zooey stepped in because Katy was a new mom when this video was made. Katy and her fiance Orlando Bloom are parents to daughter Dais, aged four months.

Double take: Katy Perry reached out to an old friend, Zooey Deschanel, to star in her new music video, End Of The World, which debuted on Monday

There she is: Zooey wore a red dress with her hair down

Double take: Katy Perry reached out to an old friend, Zooey Deschanel, to star in her new music video, End Of The World, which debuted on Monday

The New Girl does good: The beauty has always said people tell her she looks like Katy

The New Girl does good: The beauty has always said people tell her she looks like Katy

The clip begins with Zooey sitting on a park bench in a red dress and cute kitten heels with a bow on top as she reads The Smile Times newspaper. 

Flash to two men in blue with short blonde wigs are looking at controls in a spaceship above.

Back on earth, Katy is seen holding a coffee cup as she pushes a pram in front of Zooey who does not notice because the newspaper is in front of her.

Katy has on a cap with sunglasses and hoop earrings with a hoodie, leggings and sneakers as she pushes a red stroller.

Girl in the park: The clip begins with Zooey sitting on a park bench in a red dress and cute kitten heels with a bow on top as she reads the newspaper

Girl in the park: The clip begins with Zooey sitting on a park bench in a red dress and cute kitten heels with a bow on top as she reads the newspaper

Head on look: The title of the new song is on the front of The Smile Times paper with Perry on the back

Head on look: The title of the new song is on the front of The Smile Times paper with Perry on the back

See her? Katy is seen holding a coffee cup as she pushes a pram in front of Zooey who does not notice because the newspaper is in front of her

See her? Katy is seen holding a coffee cup as she pushes a pram in front of Zooey who does not notice because the newspaper is in front of her

Good mommy: Katy has on a cap with sunglasses and hoop earrings as she pushes the stroller that is red

Good mommy: Katy has on a cap with sunglasses and hoop earrings as she pushes the stroller that is red

As she passes, a stuffed dog toy falls from the stroller and Zooey picks it up.

This makes the aliens think that Zooey is really Katy and they beam her up to their ship.

Zooey, who has on pretty makeup and large earrings, looks shocked to be in the spaceship.

Perry's toy: As she passes, a stuffed dog toy falls from the stroller and Zooey picks it up

Perry’s toy: As she passes, a stuffed dog toy falls from the stroller and Zooey picks it up

The aliens have her now: This makes the aliens think that Zooey is really Katy and they beam her up to their ship

The aliens have her now: This makes the aliens think that Zooey is really Katy and they beam her up to their ship

The aliens wave at Zooey to say hello as a TV screen plays WELCOME!

Deschanel looks nervous as she walks out of her glass cylinder she came up in and walks into the main part of the ship.

A TV screen says, ‘Greetings Katy Perry! We’ve Been Waiting For You !!’

Oh no: Zooey, who has on pretty makeup and large earrings, looks shocked to be in the spaceship

Oh no: Zooey, who has on pretty makeup and large earrings, looks shocked to be in the spaceship

They love her: The aliens wave at Zooey to say hello as a TV screen plays WELCOME!

They love her: The aliens wave at Zooey to say hello as a TV screen plays WELCOME!

The group chants Katy’s name but Zooey says she is not Katy but rather Zooey.

Zooey meets the Captain and tells her, ‘We saved you from Earth!’ as he points to a screen that says the planet will self destructs.

But Deschanel is intent on saving earth.

Scary: Zooey meets the Captain and tells her, 'We saved you from Earth!' as he points to a screen that says the planet will self destructs

Scary: Zooey meets the Captain and tells her, ‘We saved you from Earth!’ as he points to a screen that says the planet will self destructs

There is even a countdown clock: The clock says the earth will self-destruct in an hour

There is even a countdown clock: The clock says the earth will self-destruct in an hour

Overwhelmed: She asks for help as the aliens dress her in a blue wig and throw a ball at her

Overwhelmed: She asks for help as the aliens dress her in a blue wig and throw a ball at her

Not for her: They gives her ice cream to put on her chest as the aliens still believe she is Katy

Not for her: They gives her ice cream to put on her chest as the aliens still believe she is Katy

The inspiration: Katy with a similar look for her California Gurls music video

The inspiration: Katy with a similar look for her California Gurls music video

She asks for help as the aliens dress her in a blue wig and throw a ball at her.

When Zooey goes to the controls, she pulls out the internet cable and saves the planet.

Katy and Zooey also talked about making the music video during a Monday interview. Katy had on a one-shoulder print top with her blonde hair pulled back. 

In 2012 Zooey remarked on looking like Katy when on The Late Show With David Letterman.

She saved the day! When Zooey goes to the controls, she pulls out the internet cable and saves the planet

She saved the day! When Zooey goes to the controls, she pulls out the internet cable and saves the planet

She was pushing the video: Katy shared on social media the video would debut on Monday

She was pushing the video: Katy shared on social media the video would debut on Monday

The brunette said she was often mistaken for Perry.

‘I was relieved because everyone kept saying “this girl looks so much like you.” And then I met her and I was like, “Thank God she’s attractive!”‘

She added, ‘I was worried she was gonna be an unattractive person.’

Chatting: Katy and Zooey also talked about making the music video during a Monday interview. Katy had on a one-shoulder print top with her blonde hair pulled back

Chatting: Katy and Zooey also talked about making the music video during a Monday interview. Katy had on a one-shoulder print top with her blonde hair pulled back