'Have you guys slept together?': Britney Spears' romance with Justin Timberlake heats up in two trailers for Lifetime biopic

A new one-minute extended trailer for Lifetime's Britney Ever After has arrived on E! News, expanding on last week's original 30-second promo.

In the longer version, viewers can catch glimpses of Britney Spears' romance with Justin Timberlake, which lasted from 1999 until 2002.

A 20-second preview's also been released, detailing her tempestuous relationships with both Timberlake and her second husband Kevin Federline.

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Passion: A new one-minute extended trailer for Lifetime's Britney Ever After has arrived on E! News, expanding on last week's original 30-second promo and showing her romance with Justin Timberlake

Whilst the first trailer did appear to contain a brief shot of the NSYNC singer staring across a nightclub, there were no shots of him and Spears together.

Meanwhile, in the extended sequences, they can be seen kissing passionately - he baring his toned arms in a tank top - as well as holding hands out and about.

The advert soon launches into the familiar refrain from last week: Natasha Bassett as the Toxic singer shaving her head, her slightly lengthened voice-over saying: 'I'm not gonna sugarcoat it and say I was fine, 'cause I wasn't.'

Who's who: Nathan Keys will be playing the NSYNC singer, Natasha Bassett the leading lady

In addition to the new footage of Nathan Keyes as Timberlake, the extended trailer also features a hitherto unreleased scene with Clayton Chitty's Kevin Federline.

Shirtless as well, he wraps his arms about his wife and kisses her in the swimming pool, and the pair of them ultimately submerge themselves completely.

It's the second spot released Tuesday, however, that gives a fuller picture of what the Lifetime film will cover in regards to the two relationships.

The real ones: Spears and Timberlake dated from 1999 until 2002

More footage: Though the extended trailer does show a steamy kiss between them (pictured), another preview released Tuesday expands on their relationship, as well as her relationship with her second husband

The advert's Timberlake portion contains yet another kiss - though this time he's got a blue tank top on - and a couple of shots of them getting cosy at a nightclub table.

A reporter's also seen asking the couple outright: 'Have you guys slept together?' as she interviews the pop stars on a red carpet.

In the Federline section, he lies in bed, wearing nothing but underwear and showcasing his musclebound figure, and proposes.

What once was: Clayton Chitty will play Kevin Federline, the titular pop star's second husband, to whom she was married from 2004 until 2007, and who also appears in the extended trailer as well as the new preview

After some brief snatches of wedding footage - the pair were married from 2004 to 2007, resulting in two sons and a tempestuous custody battle - the ad moves on.

In a sparkling miniskirt, the Womaniser singer can be seen emerging from a car, photographers snapping as voice-over insists: 'You're Britney Spears; they love you.'

With a cast including Jillian Walchuck as Paris Hilton and Nicole Oliver as Lynn Spears, the film will premiere in the US February 18 and the UK February 26.

Incoming: With a cast including Jillian Walchuck as Paris Hilton and Nicole Oliver as Lynn Spears, the film will premiere in the US February 18 and the UK February 26

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