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Harry is the last member of One Direction to turn 18 so to celebrate Capital FM has taken a look back at some of the best moments of his pop career so far.
Guess who? 18 years ago Harry Styles was born in Holmes Chapel, Cheshire. Picture: Rex Features
Harry joined Liam Payne, Niall Horan, Zayn Malik and Louis Tomlinson on The X Factor to form boy band One Direction and the band launched their first single 'What Makes You Beautiful' in September 2011
Harry shows off some unusually flamboyant jewellery while hanging our with Oritse William from fellow The X Factor group JLS. Picture: Twitter
One Direction began their first headline tour in Wolverhampton back in December and played 24 dates across the country while performing tracks from their debut album 'Up All Night'.
Harry headed out to the US with the rest of One Direction this month and was pictured relaxing outside the band's Los Angeles hotel shortly after being greeted by hundreds of screaming fans. Picture: Big Pictures
When Capital FM counted down the best hairstyles in pop Harry came in at a respectable eighth position, only behind heavyweights like Rihanna, Beyonce and Lady Gaga.
Harry and One Direction's Louis Tomlinson posted this picture of them relaxing backstage during the band's recently completed 'Up All Night' tour across the UK and Ireland. "Backstage with @Louis_Tomlinson and @Harry_Styles 1DHQ x: Picture: twitter
Despite the popularity of his long curly hair Harry revealed last year that he would consider shaving his trademark mop off for charity if the right opportunity came up but not anytime soon because he would "look funny bald".
The 'One Thing' singer showed some clear favouritism over his fellow bandmates when he donned this homemade t-shirt declaring his love for One Direction's Louis Tomlinson.
Back in October Harry donned this unique top hat and showed off his new look to fans. "I have found my new accessory...just need a cane now!" - Harry Styles. Pictures: Twitter
While putting the finishing touches to their debut album 'Up All Night', One Direction's Zayn Malik tweeted this picture of Harry recording with his pants down. "Zayn Malik tweets a treat for us ahah" Picture: Twitter
After launching their music careers with 'What Makes You Beautiful', One Direction then published their biography 'Dare To Dream', which detailed each of their journeys to pop stardom. Harry is seen here signing copies of the book during an event at WH Smiths' in London.
On the week that their first single 'What Makes You Beautiful' topped the Vodafone Big Top 40 Harry joined his bandmates at Capital FM for a webchat where they discussed everything from getting married to getting tattoos.
Harry shows off his soft side after being introduced to bandmate Niall Horan's grandmother. "Me and Niall's gorgeous granny!! Live this woman." Picture: Twitter
Back in November 2011 it was reported Harry was being lined up for a modelling career on top of being one-fifth of One Direction after meeting up with London-based FM Model Agency.
The 'Gotta Be You' singer achieved his New Year's Resolution early when he passed his driving test in December 2011. "Massive well done harry!!!!!! Errmmmm Can I have a lift mate?" - One Direction's Liam Payne.
The 'One Thing' singer gained an unexpected fan recently when Arnold Schwarzenegger's 22 year-old daughter Katherine tweeted that she has watched the band's music videos and thinks Harry is "a cutie"!
Despite only just turning 18 Harry is clearly a big coffee lover already. “Harry Styles is very proud of his new starbucks cup" - Liam Payne. Picture: Twitter