PICTURE EXCLUSIVE: School's out forever! Kate Moss' half-sister Lottie, 18, ditches her shoes in an elegant Bardot-style prom dress as she parties with friends at Leavers' Ball

Two weeks ago, she was on the red carpets of Cannes Film Festival.

But Lottie Moss was back to being a normal teenager this week as she marked the end of her A-Level year with a Leavers' Ball.

Kate Moss' model half-sister, 18, was pictured spilling out of a Brighton, East Sussex venue with her friends, having partied until her glamorous prom heels were in hand.

Scroll down for video  

Party girl: The blonde looked elegant in a white Bardot dress
Heels off: She carried her heels home after partying hard

School's out! Kate Moss' half-sister Lottie left her shoes behind as she left her Leavers' Ball on last week

Lottie, who recently said she feels Hannah Montana 'living in two worlds,' took after her supermodel sister in the high-glamour stakes, plumping for a simple yet supremely elegant white gown.

Full-length with a split in the back, the gown sat off her shoulders and just skimmed the floor when she finally ditched her skyscraper heels for comfort at the end of the night.

The aspiring model's tresses were just like supermodel Kate's with a light wave and a natural, honey colouring.

Going barefoot: Having partied hard, Lottie was done with her skyscraper heels and picked them up instead

Going barefoot: Having partied hard, Lottie was done with her skyscraper heels and picked them up instead

Girls' night: She stuck close to a friend, who dressed in a contrasting red dress to her white gown

Girls' night: She stuck close to a friend, who dressed in a contrasting red dress to her white gown

Marring her display: Having taken her shoes off, the blonde was just about scraping her dress on the floor

Marring her display: Having taken her shoes off, the blonde was just about scraping her dress on the floor

Go all white on the night with Lottie's Missguided prom dress

In the US, the prom is the biggest night of a teenager’s life, but here in the UK it's the leaver’s ball and Kate Moss's half-sister Lottie Moss celebrated hers this week.

The young model swapped Cannes for Brighton as she celebrated her end of year hurrah with all of her school friends by her side. Lottie looked super stylish in a white Bardot off shoulder maxi dress which sculpted her slim figure and looked both quirky and elegant. Despite wearing Dior in Cannes, Lottie opted for a high street favourite for her UK occasion and this chic maxi dress is by Missguided and a steal at only £35!

Perfect for an upcoming prom or party, get your hands on this gown by clicking to the right and snapping up one of the last ones. Alternatively if you want to shop around first, check out our edit below with white maxi styles from the likes of Jessica Wright for Lipsy, Missguided and AQ/AQ. Keep accessories subtle so as to let the dress shine ad opt for monochrome or metallic tones.

* PRICES MAY NOT BE AS ADVERTISED
Living in two worlds: Just two weeks ago, Lottie took to the red carpet at Cannes Film Festival screening for Loving, proving that she really does live in two different worlds to her peers

Living in two worlds: Just two weeks ago, Lottie took to the red carpet at Cannes Film Festival screening for Loving, proving that she really does live in two different worlds to her peers

Clearly popular among her peers, the stunning blonde was pictured hanging out in large groups of dressed up revelers. 

At 16, Lottie identified her favourite school subjects to be History, English and PE though her specialist subjects were Justin Bieber and The Tudors.

Speaking to Vogue last month, Lottie revealed that her A-Level exams were due to begin in June, as she continues to balance her budding career with school work.

'Sometimes I feel like I live in two worlds,' she said. 'One minute I'm in a Dior suite in Cannes and then the next I'm in a classroom in Sussex. I feel like I'm Hannah Montana.'

Popular girl: The blonde was pictured in groups of dressed up revelers

Popular girl: The blonde was pictured in groups of dressed up revelers

Cheeky: From behind, it was cut that hugged to every inch of her frame

Cheeky: From behind, it was cut that hugged to every inch of her frame

Chatting away: Her elegantly-dressed dressed seemed to make her the centre of attention

Chatting away: Her elegantly-dressed dressed seemed to make her the centre of attention

Time to party: The party marked the end of their A-Level year in Brighton

Time to party: The party marked the end of their A-Level year in Brighton

Studying hard: The aspiring model has been leading a double life in the last year, as she takes up the spotlight

Studying hard: The aspiring model has been leading a double life in the last year, as she takes up the spotlight

Finally free: With her career on track, all that was left to do wads to get through her studies

Finally free: With her career on track, all that was left to do wads to get through her studies

Explaining that she had to squeeze in brief moments of revision during her time in Cannes last month, Lottie added: 'It’s important to me that I manage school and my modelling. I'm now able to fund my own schooling through any jobs I book.' 

Lottie travelled to Cannes with Storm Model Management, the bookings company she signed with at the age of 16 and the same one that scouted Kate at 14.

At the event, she walked the red carpet at the Loving screening with her big sister Kate, with whom she shares father Peter Moss. 

That'll ruin the gown: Later, like typical teenagers, the girls were spotted taking a load off on the floor

That'll ruin the gown: Later, like typical teenagers, the girls were spotted taking a load off on the floor

Heading back in: She pushed a revolving door with all of her bits in hand
Running without heels: She went barefoot with a little run

All the essentials: With her shoes in hand, she also balanced her phone and her clutch bag

Not too posh to push: The blonde was originally scouted at the age of 14 but waited until 16 to sign with an agency

Not too posh to push: The blonde was originally scouted at the age of 14 but waited until 16 to sign with an agency

'The first of many': The blonde took to Instagram with a picture of the night earlier this week

'The first of many': The blonde took to Instagram with a picture of the night earlier this week

After her exams, the 18-year-old is off to Majorca for a holiday with her friends and she also plans to attend Wildlife festival in Brighton and Bestival music festival in Isle Of Wight. 

Lottie, born a week before Kate's 24th birthday, grew up in West Sussex with Pete and mother Inger, who is a boutique owner.

The school girl was originally scouted at Kate's wedding to Jamie Hince in 2011 but waited until the week of her 16th birthday to sign with an agency. 

Girls just wanna have fun: Lottie seemed to have the same proportions as her big sister

Girls just wanna have fun: Lottie seemed to have the same proportions as her big sister

Having a ball: The stunner has been working hard on revision for the last month

Having a ball: The stunner has been working hard on revision for the last month

Party hard all summer: She has plans for festivals and a Spain holiday this summer

Party hard all summer: She has plans for festivals and a Spain holiday this summer

An elegant choice: She stuck to a statement style of clean design and block colours

An elegant choice: She stuck to a statement style of clean design and block colours

Hanging out: Chaperons accompanied the group of revelers to the bash

Hanging out: Chaperons accompanied the group of revelers to the bash

Good girls: For a Leavers Prom, the students were on best behaviour

Good girls: For a Leavers Prom, the students were on best behaviour

Sussex girl: Lottie grew up in West Sussex and studied in Brighton

Sussex girl: Lottie grew up in West Sussex and studied in Brighton

Throwback: Lottie got into the fashion world via her sister Kate Moss (left, here in February 2014)

Throwback: Lottie got into the fashion world via her sister Kate Moss (left, here in February 2014)

The comments below have not been moderated.

The views expressed in the contents above are those of our users and do not necessarily reflect the views of MailOnline.

By posting your comment you agree to our house rules.

Who is this week's top commenter? Find out now