One Direction have topped Heat magazine's annual rich list with a fortune of £59.33 million - meaning Harry Styles, 19, Niall Horan, 19, Zayn Malik, 20, Liam Payne, 20 and Louis Tomlinson, 21, are absolutely rolling in it.

One DirectionOne Direction, Worth A Cool £50 Million

Of course, Heat magazine have no idea how much One Direction are worth - they're guessing. Then again, even Forbes - the king of celebrity wealth - have to speculate on the finances of the rich and famous. And it makes for good reading.

So, elsewhere on Heat's list, Daniel Radcliffe came in second with a reported fortune of £56.18 million thanks mainly to the Harry Potter franchise. Robert Pattinson, Keira Knightley and Emma Watson also managed to squeeze into the top five with over £30 million each. Not bad.

Further down the list was a couple of new entries, notably DJ Calvin Harris who appears to have a cool £22.2 million in the bank. Model Rosie Huntington-Whitely is living on the breadline with a mere £5.63 million, while poor old JLS only have £4.97 million to their name - and they've split up. 

Watch the One Direction This Is Us trailer:

The biggest climber was Carey Mulligan (up 10 places to No.19) after her starring role in The Great Gatsby, while actor Aaron Taylor-Johnson - who could still play Christian Grey in Fifty Shades of Grey - jumped eight places to No.16.

According to the group's management company Modest! Management, One Direction have sold around 19 million singles and 10 million albums worldwide (Check out our list of the biggest selling One Direction songs). Nick Gatfield, chairman and chief executive of Sony Music Entertainment UK, says 1D represent a $50 million business empire.

The Top Five Richest British Celebrities under 30 are as follows:

One Direction (£59.33 million)

Daniel Radcliffe (£56.18 million)

Robert Pattinson (£44.16 million)

Keira Knightley (£37.28 million)

Emma Watson (£27.93 million)