The One Direction hunk turned 19 on 1 February and marked the occasion by splashing on on a red Porsche Caymen S, which is currently being customized to suit his tastes.
Harry only bought the car after initially test driving a Porsche Carrera as a gift for his "brilliant" father Des, but then fell in love with the sports vehicle and decided to get himself a new car too.
A source told the Daily Star newspaper: "Harry is besotted by cars and loves the Porsche brand after test driving a few.
"He has bought a £100,000 Carrera from a car dealer near his dad's home in Sale, Manchester.
"It is black with tinted black windows, Harry said it was a present for his dad.
"Harry also ordered a brand new factory made red Cayman S for himself.
"He's having it customised with all the extras including a six speaker Bose surround sound, heated seats and installing a telephone."
Harry's new Porsche will join his other vehicles, a £100,000 Audi R8 and a Range Rover Sport, which he splashed out on last year after passing his driving test in December 2011.
The 'Little Things' singer's beloved dad has said he would love Harry to buy him a car, though he insisted he would never rely on his superstar son for financial benefits.
Des said: "I wouldn't take money from Harry.
"But I'm sure one day I'll come home and there's a Mercedes on the drive or something, quite possibly and that would be lovely.
"I don't need to rely on him at all financially and I wouldn't out of a sense of pride anyway."