WE'RE all familiar with the summer holiday transformation - whether its a growth spurt or a new haircut, someone will always come back to school looking completely different.

But none are quite as unrecognisable as transgender teenager Kairah Kelly's new look.

8 15 year old Kairah Kelly could be the reality star's doppelganger Credit: Torch One time usage images

15 year old Kairah was born a boy, and known to classmates and teachers as 'Tyler', until September 2015 when she returned to school in Middlesbrough after the summer as a girl.

Not only that, but the glamorous teenager had modelled her transformation on her idol, Kim Kardashian, adding glossy black extensions to her own long hair, and expertly contouring her face.

8 Kairah's transformation left her feeling happier and more confident in herself Credit: Torch One time usage images

Despite the confidence she found in her new appearance - with some teachers not even recognising the teen - Kairah had struggled throughout her life with her identity, saying: "I felt really strange and different. I'd look in the mirror and the person I saw was a stranger."

The teen had experimented with her gender identity from a early age, imagining herself "in skirts and dresses when I was as young as eight years old."

8 Kairah Kelly, before transitioning, aged 13 Credit: Torch One time usage images

She was uncomfortable living as a boy, and would wander around the family home wearing make-up, nail varnish and heels.

But mum Angela, 30, and Christian step-dad Chris, 49, put a stop to this secret habit, worrying about the reaction of friends and neighbours in their North Yorkshire home.

8 Kairah's parents worried about her being bullied Credit: Torch One time usage images

"They didn't understand who I was. We lived in a rough area and they thought I would be bullied."

Kairah says that when she looks in the mirror now, she finally feels comfortable in herself.

"I was so nervous when I turned up for my first day on September 5 but I didn't need to be. Everyone was so supportive and happy for me."

8 14 year old 'Tyler' struggled with his identity Credit: Torch One time usage images

Aged 11 'Tyler' came out as bisexual - and then told family and friends he was gay two years later.

"I didn't feel confident after coming out as gay," said Kairah. "I felt like there was something missing."

8 A YouTube video helped Kairah discover who she really was Credit: Torch One time usage images

When he was 14 years old, 'Tyler' found a video on YouTube about a transgender woman, who spoke about feeling trapped in the wrong body – and he felt instant identification.

Kairah admits to not knowing how her parents would react, and said she drafted the text message to tell her mum over and over again. Luckily Kairah's parents were both happy.

"She was really supportive, telling my dad that night. He was accepting. The next morning he told me he loved me for who I was."

8 The Facebook post Kairah came out to friends in Credit: Torch One time usage images

In September 2015, 'Tyler' published a post on Facebook announcing that he was transgender and changing his name to Kairah.

Now living as a girl, she has been referred for gender identity treatment and hopes to start taking hormone blockers soon.

8 Kairah copies Kim's outfits, make up and style Credit: Torch One time usage images

Kairah wasted no time copying her role model, Kim Kardashian, swapping jumpers and tracksuits for skinny jeans, skimpy dresses and colourful tops.

And after adding extensions to her long black hair and wearing a full face of make-up, she is a dead ringer for the reality star, whose initials 'KK' match her own.

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She says: "I love the glamorous look and I've always been a fan of the Kardashians. They were happy and comfortable with themselves and that's what I've always wanted."