Harry Styles is a good friend

Harry Styles proved he's a great friend when he got James Corden to send a special 18th birthday message to his school pal Alice Caulkner.

James, 33, recorded a song on Alice's voicemail before calling her up from New York, where he's currently starring on Broadway in hit musical One Man, Two Guvnors.

'Just got your birthday song. Amazing. #appreciative #mademy18th xxxx,' Tweeted Alice to James.

'Lovely to talk to you #smashoed.'

James has previously spoken about being a fan of the One Direction boys while they've described him as a 'love guru' who gives great advice.

Harry, 18, knew that the Gavin & Stacey star would be up for surprising Alice, who's been his 'rock' since he first appeared on The X Factor in 2010.

'Alice has been there for two years of his mad life, she's kept him grounded,' a source tells The People.

'She's a huge fan of Corden's so he thought it would be the perfect birthday treat.'

SEE PICTURES Harry Styles and One Direction perform new song Gotta Be You on German TV show

SEE PICTURES Harry Styles and One Direction at Capital FM Jingle Bell Ball 2011

SEE VIDEO Harry Styles and One Direction mobbed by screaming fans in London

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