Dakota Fanning and Elizabeth Olsen play Very Good Girls who make a pact to lose their virginity before they go off to college.

The coming-of-age drama sees Dakota and Elizabeth peeling off their clothes to go skinny dipping in the ocean to broaden their horizons.

Dakota, 20, plays Lily who is determined to experience as much of life as she can during the first summer after high school graduation.

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Very Good Girls very determined: Dakota Fanning strips off her clothes to go swimming in the ocean naked with Elizabeth Olsen in the trailer for the coming-of-age drama Very Good Girls

But her close friendship with Gerry, played by the 25-year-old indie favourite Elizabeth, is tested when they fall for the same guy.

The trailer opens with the girls huddling behind a lifeguard tower with Gerry covering her bare chest with her hands and Lily stalling while getting undressed.

‘I can’t do this,’ Lily whines, and Gerry tells her, ‘You can, the question is will you.’ The next moment they’re running to the water in just their birthday suits.

Naked and not quite loving it: Elizabeth Olsen plays Gerry, who urges Lily to shed her clothes and inhibitions

Peeling away: Lily and Gerry huddle behind a lifeguard tower while doffing their shorts, shirts and bathing suits

The time has arrived: Lily whines to Gerry, ‘We’re going to college and we’re still virgins’

‘We’re going to college and we’re still virgins,’ Lily says in another scene.

‘We’ve got to get over this hump,’ Elizabeth chides them both.

The mini-movie follows Lily as she meets David, ‘the ice cream guy from the beach,’ who’s also handy with the camera, played by hunky Boyd Holbrook.

Making a pact: Gerry counsels Lily that they’ve got to have sex with a guy this summer before college starts in the fall

Hunk bait: Lily finds herself drawn to David (Boyd Holbrook), ‘the ice cream guy at the beach’ who walks around without his shirt

Enjoying the view: The romance between Lily and David blooms as they enjoy a date together

David captures her interest after she spots a photograph he took of her posted on a wall as she’s walking in the rain.

Romance blooms and the pair are seen zooming away on his motorbike and then enjoying the city view from a lookout point.

But Norma, played by Ellen Barkin, isn’t too keen on the teenager’s late night hours.

Passionate: Dakota, 20, shares a sexy make-out scene with the blond Boyd

Love scene: Lily and David relax in bed after a night of passion in the movie trailer that boasts the tagline, ‘When we lose our innocence, we have to find ourselves’

‘Would you like to tell me where you were so late?’ Norma questions her.

Lily must also deal with a touchy-feely employer Joe (Peter Sarsgaard), and she tells Gerry: ‘My boss is a perv.’

‘I bet it must feel kinda good to have a guy want your body,’ Gerry suggests over a meal.

Friendship tested: Complications set in when Gerry admits to having feelings for the same guy, telling Lily, ‘All I can think about is David’

‘When we lose our innocence,’ the tagline says, ‘we have to find ourselves,’ before cutting to a scene in which Dakota makes out with Boyd.

Lily’s first passionate love is complicated when Gerry falls for the same guy.

‘All I can think about is David,’ Gerry tells Lily, and then scenes show Gerry giving David the suggestive look over.

A-list cast: The movie was directed by Naomi Foner (mom of Jake and Maggie Gyllenhaal) and also stars Demi Moore

‘If you want perfect, get out. We make mistakes,’ David says to Lily.

Lily and Gerry have an explosive moment where Dakota’s character shoves her best friend away, shouting, ‘you guys are sick!’

‘Sometimes it’s harder to forgive yourself than it is to get someone else to do it, but people will surprise you,’ David counsels Lily.

The movie – which is set for a limited US release on July 25 – also stars Demi Moore and Richard Dreyfuss, and was directed by Naomi Foner, the mother of Jake and Maggie Gyllenhaal.