One Direction have been named Britain's richest stars under the age of 30.

The 'Little Things' hitmakers - comprising Louis Tomlinson, 23, Niall Horan, 21, Zayn Malik, 21, Harry Styles, 20, and 21-year-old Liam Payne - have amassed a collective fortune of £77.5 million, retaining the top spot in heat magazine's annual list thanks to endeavours such as selling their name and image rights to Coles supermarkets in Australia, releasing two fragrances, embarking on a world tour and selling four million copies of their latest album 'Midnight Memories'.

Second place on the list was 'Harry Potter' star Daniel Radcliffe with an estimated fortune of £63.5 million, while his former wizarding co-star Robert Pattinson took third place with estimated earnings of £51.4 million.

And it seems 'Horns' actor Daniel, 25, wasn't happy with his ranking as he felt he should have been given the top spot.

He joked to heat: ''There's five of them! That doesn't count! Not that I care but I am definitely first!''

Also featured on the list - which is based on estimated earnings from movie deals, record sales and other endorsements - were actress Keira Knightley, 29, in fourth place with £39.9 million and singer Adele, 26, who took fifth spot with a fortune of £36.25 million.

The top 10 also featured two more 'Harry Potter' stars, 24-year-old Emma Watson, who was ranked sixth with a fortune of £31.66 million and eighth placed Rupert Grint with £27.33 million.

Calvin Harris, 30, took seventh spot with £28.99 million, and the top 10 was completed by singers Leona Lewis with £15.51 million and Arctic Monkeys frontman Alex Turner, 28, with £13.56 million.

Despite the staggering sums, the British stars' fortunes were dwarfed in the international stakes.

The publication compiled a top five from outside of Britain, with 28-year-old twins Mary-Kate and Ashley Olsen taking the top spot with a huge £182 million fortune.

Lady Gaga placed second with £132 million, Justin Bieber third with £105 million, Taylor Swift in fourth with £86 million and Miley Cyrus completed this list with a fortune just ahead of One Direction's, £78 million.

heat magazine's 30 richest British stars under 30:

1. One Direction (£77.52m)

2. Daniel Radcliffe (£63.56m)

3. Robert Pattinson (£51.41m)

4. Keira Knightley (£39.95m)

5. Adele (£36.25m)

6. Emma Watson (£31.65m)

7. Calvin Harris (£28.99m)

8. Rupert Grint (£27.33m)

9. Leona Lewis (£15.50m)

10. Alex Turner (£13.56m)

11. Katie Melua (£12.63m)

12. Coleen Rooney (£11.7m)

13. Joss Stone (£10.02m)

14. Charlotte Church (£9.67m)

15. Aaron Taylor-Johnson (£9.60m)

16. Carey Mulligan (£9.41m)

17. Florence Welch (£8.88m)

18. Nadine Coyle (£8.10m)

19. Nicola Roberts (£8.01m)

20. Gemma Arterton (£7.98m)

21. Cara Delevingne (£7.49m)

22. James Morrison (£7.49m)

23. JLS (£7.18m)

24. Jamal Edwards (£7.14m)

25. Mumford & Sons (£6.98m)

26. Lily Allen (£6.71m)

27. Jamie Bell (£6.73m)

28. Paolo Nutini (£6.28m)

29. Duffy (£6.26m)

30. Lily Cole (£6.20m)

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