THE No 1 girl in Lewis Hamilton’s life has defended his playboy lifestyle and claims: “He is not a party boy.”

Kiwi Angela Cullen is officially Hamilton’s physio but during Grand Prix weekends she acts as his high-powered personal assistant, chauffeur, waitress and even alarm clock.

4 Lewis Hamilton has been reliant on physio Angela Cullen for so much at Grand Prix weekends Credit: Getty Images

She knows the real Lewis Hamilton probably better than anyone else in Formula One.

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The three-times world champion has been slammed by critics for his jet-set lifestyle between races.

But Cullen reveals: “I have spent the whole year with him and we partied maybe four times.

“He is not a party boy. If he has a three-week recovery between races he might have a drink to celebrate a race win, but if there is a race meeting the next week, he won’t drink at all.

“He occasionally does crazy things but no more than any normal person.

“He is the most amazingly talented and dedicated athlete.

Lewis Hamilton celebrates being crowned Formula One world champion for fifth time after fourth place finish in Mexico

4 Lewis Hamilton lost his world crown to Mercedes team-mate Nico Rosberg but the tension between them has cooled Credit: PA:Press Association

4 Hamilton is totally different from his wild-boy image, says physio Angela Cullen Credit: Getty Images

“And there is not a day or a race where I leave and don’t get a text thanking me for what I do.

“I’m not someone who would just do the job because it is exciting. I need to be working for someone I really want to help — and he really does instil that in me.”

Based in Switzerland, Cullen works for Hintsa Performance, which helped design Hamilton’s Nasa-based health programme, including a sleep doctor, to combat jet lag.

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She started her sports career 25 years ago and has worked with elite sprinters in British athletics.

In an interview with New Zealand Herald, she added: “I’m called a physiotherapist but the role with Lewis is as performance coach.

“Over the course of a race weekend, my job is to eliminate any external factors so he only has to think about his driving and not have to worry about anything else.

4 Lewis Hamilton will be hoping to regain the world crown he lost to Nico Rosberg Credit: AP:Associated Press

“I wake him up, I order his food, I drive him to the track.

Hamilton asked Cullen — who has also worked with former team-mate and rival Nico Rosberg — to be his coach at all of the 2016 Grands Prix.

She said: “I thought he was joking because they don’t have any female coaches in Formula One.”