Watch this exclusive clip from sci-fi thriller “UFO” starring Gillian Anderson, David Strathairn, Alex Sharp, Ella Purnell, and debuts on digital and DVD September 4th.

Derek (Alex Sharp) a brilliant college student, haunted by a childhood UFO sighting, believes that mysterious sightings reported at multiple airports across the United States are UFO’s. With the help of his girlfriend, Natalie (Ella Purnell), and his advanced mathematics professor, Dr. Hendricks (X-Files’ Gillian Anderson), Derek races to unravel the mystery with FBI special agent Franklin Ahls (David Strathairn) on his heels.

There’s the nondescript businessmen in button-downs discussing their clients, the hungover rockers chaining their Parliaments, socialites sipping on sugary drinks while they check their Instagram feeds on their phones. Just another Wednesday at the Chateau Marmont. My own cell buzzes, jolting me out of my reverie: Hi Tori it’s Ella. So sorry, running 5 mins late, underestimated LA traffic!! X. The actress may have the acting chops to make it in Hollywood, but she’s imported a quintessential British politeness alongside that sets her apart from the typical Chateau demo.

As promised, she arrives five minutes later, wearing a breezy button- down dress, her hair in a wispy updo. She extends her hand, complete with bubblegum pink nails, polish chipped at the corners, and apologizes again for her on-time-by-LA-standards arrival. We head inside since she only packed for sunshine: “Is February always really cold and windy, or is it just now that Trump is in town?” she says with a smile.

Since her first major role in 2010’s Never Let Me Go, Purnell has risen through the ranks by nailing a certain type—usually a precocious teenager or strong-willed heroine facing larger-than-life challenges. But as she’s matured, so have the parts that are coming her way. She’s now exploring the world of television for the first time with her most adult role to date. In Sweetbitter, Purnell is cast as Tess, a struggling New York waitress who is developing a palate for fine wining and dining and sensual trysts. Although Tess’s life may seem lavish, it is far from it—the first episodes find her living paycheck to paycheck, trying to find her calling.

Purnell says that it’s been her most natural role yet. “I do not have to act on the show,” she tells me. “I am Tess.” For someone who has flourished by playing characters in extraordinary, sometimes fantastic situations, Tess may seem like a surprising choice. However, the realistic way in which Tess’s life is depicted on the show was exactly what drew Purnell to the role: “This thing came through my email, and I think the first line said, ‘Tess’s life is in shambles.’ I was like, dude, me too!” Although the actress may seem to have a clear path ahead of her, she, like many of us, is still figuring things out as she goes. “I’m 21 and I have no idea what I’m doing or who I am. Everybody sort of looks like they have their life together on the outside, but nobody really does. Everybody has that ten-percent of them that wants to get a dog, move to Fiji, and open up a bar.”

Ella Purnell talks about developing her skills as a waitress, her issues with the film adaptions of Harry Potter and getting her mom addicted to tattoos.

‘Sweetbitter’ Star Ella Purnell Went to Restaurant Boot Camp for Coming-of-Age Series

Actress learned everything from the dreaded three-plate carry to the proper way to pour wine

It’s a lot more difficult working in a restaurant than it looks — even if you’re acting as a server.

British actress Ella Purnell stars as Tess, a young woman who moves from Ohio to New York City after college. And like many recent grads with big ideas and small budgets, she gets a job as a server at a trendy New York restaurant. Actually, she has to train a while before she can be a real server, and she starts out as a back waiter.

To prepare for the role, Purnell went through two weeks of “boot camp” to learn all about fine dining.

“We had two weeks of, like, boot camp, where we learned how to serve, basically,” Purnell told TheWrap in a recent interview.

“It went from everything from like how to fold napkins to and how to lay a table from opening a bottle of wine, pouring it correctly, how to do a three-plate carry, the correct way to serve,” Purnell explained. They even had a front of house consultant.

“You become physically, like, so tired,” Purnell said. “Those plates are heavy. Your back, your shoulders, your arms.”

“Sweetbitter” is based on Stephanie Danler’s novel of the same name, and readers of the book will know this sounds a lot like Tess’ experience.

“I felt like I was going through this with Tess,” Purnell said.

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