How Old Was Chloe Moretz as Cassie Sullivan in The 5th Wave?

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In January 2016, Chloe Moretz was busy promoting her new movie, “The 5th Wave,” which was released to generally unfavorable reviews from critics on January 22, 2016, in the United States.

The then 18-year-old actress, who stars as Ohio high-schooler Cassie Sullivan, paid “Jimmy Kimmel Live” a visit to talk about her American science fiction action film.

Chloe Grace Moretz wears her short hair in curls as she arrives at ABC studios for an appearance on "Jimmy Kimmel Live"Chloe Grace Moretz wears her short hair in curls as she arrives at ABC studios in Los Angles for an appearance on “Jimmy Kimmel Live” on January 13, 2016

Aside from promoting her new film, she also dished on The Little Mermaid and revealed that she “can’t really swim.”

“I can’t really swim! I mean, I can but I’m not a strong swimmer. Maybe that’s the new story: a mermaid who learns to swim!” she said.

“It shows people believe in yourself, unless you drown, in which case, it’s a terrible story. It wouldn’t be great for young girls,” joked Kimmel.

“I’m right in the process of starting [to prepare]. I have to learn how to swim with a tail. It’s been kind of crazy… It could potentially [be horrible]… I still have a few months to process it,” she added.

“It definitely was one of the most exciting things I’ve ever booked because it’s just something I grew up with,” the Diary of a Wimpy Kid actress revealed. “The Little Mermaid—we all kind of grew up with it, at least knowing it.”

Chloe Moretz wears an Ashley Williams skirt and a Mary Katrantzou top out in Los AngelesChloe Moretz wears an Ashley Williams skirt and a Mary Katrantzou top out in Los Angeles

How old was Chloë Grace Moretz in The 5th Wave?

In April 2014, it was announced that Chloe would play the main protagonist Cassiopeia “Cassie” Marie Sullivan in the film adaptation of Rick Yancey’s The 5th Wave. The young adult science fiction novel is available on Amazon.

Principal photography began on October 18, 2014, in Atlanta, Georgia, when she was 17-years-old. Born on February 10, 1997, in Atlanta, Georgia, she turned 18 on February 10, 2015.

Chloë Grace Moretz was 17 when filming The 5th Wave as Cassiopeia "Cassie" Marie SullivanChloë Grace Moretz was 17 when filming The 5th Wave as Cassiopeia “Cassie” Marie Sullivan

The “Kick-Ass” star looked incredible in an edgy ensemble, including a zip-front high-waisted pleated leather corset skirt by Ashley Williams and a see-through red, black and white striped top by Mary Katrantzou.

Chloe Moretz wears a black bandeau underneath a sheer blouse while heading to an appearance on "Jimmy Kimmel Live!"Chloe Moretz wears a black bandeau underneath a sheer blouse while heading to an appearance on “Jimmy Kimmel Live!”

Chloe remained modest by layering a black bandeau underneath her sheer top. She finished off the look with a pair of black T-strap pumps by Christian Louboutin.

Chloe Moretz pairs Christian Louboutin pumps with her black-and-red ensembleChloe Moretz pairs Christian Louboutin pumps with her black-and-red ensemble

Chloe wore Christian Louboutin’s “J String” pumps, which we’ve been seeing on a number of celebrities since late last year.

Chloe Moretz reveals toe cleavage in Christian Louboutin pumpsChloe Moretz reveals toe cleavage in Christian Louboutin pumps

Her shoes are made of glossy patent leather and feature T-straps, pointed toes, buckled ankle straps, and about 4.5-inch heels.

Chloe Grace Moretz shows off her feet in t-strap "J String" pumpsChloe Grace Moretz shows off her feet in t-strap “J String” pumps

These pumps can be purchased at Mytheresa and Nordstrom.

Black Christian Louboutin J String Pumps, $945

Black Christian Louboutin J String Pumps

Black Christian Louboutin J String Pumps

Credit: Michael Wright / WENN