Sultry Scarlett Johansson (25) earned a welcome boost from Iron Man 2 to remain in the list at 15th despite a drop of seven places on last year with lads' favourite Megan Fox (24) coming up against a backlash of criticism after Jennifer's Body and Transformers 2 - down three at 16 from 13.

Kirsten Dunst (28) is in 17th after a seemingly quiet year however the actress has a slew of films due out in the coming year so will be busy worldwide promoting movies including On The Road and All Good Things.  Emma Stone (21) of Zombieland and Superbad is named at 18.

Anne Hathaway's (27) performance as the White Queen in Alice in Wonderland was the only saving grace to stop the star dropping off the list, despite topping the list last year with an Oscar nod for Rachel Getting Married.  We won't mention Bride Wars or Valentine's Day...

Finally the last new entry in the Top 20 Actresses Under 30 list at 20 is Alia Shawkatt (19) who film fans recently watched in Whip It and will also see starring alongside Kristen Stewart and Dakota Fanning in The Runaways. Fans will also recognise her from US show Arrested Development and an impressive performance in indie film Amreeka.

Names dropping out of the list this year include Sienna Miller, Evan Rachel Wood and Zooey Deschanel.

Top 20 Actresses Under 30 are as follows:

1. Kristen Stewart, 20 (2009 ranking 9) +8 places
2. Michelle Williams, 29 (2009 ranking 3) +1 place
3. Mia Wasikowska, 20 (2009 ranking 18) +15 places
4. Carey Mulligan, 25 (2009 ranking 17) +13 places
5. Amanda Seyfried, 24 (new entry)
6. Emily Blunt, 27 (2009 ranking 4) -2 places
7. Abbie Cornish, 27 (2009 ranking 7) static
8. Ellen Page, 23 (2009 ranking 6) -2 places
9. Gemma Arterton, 24 (new entry)
10. Freida Pinto, 25 (new entry)
11. Saoirse Ronan, 16 (2009 ranking 16) +5 places
12. Anna Kendrick, 24 (new entry)
13. Keira Knightley, 25 (2009 ranking 2) -11 places
14. Natalie Portman, 29 (2009 ranking 5) -9 places
15. Scarlett Johansson, 25 (2009 ranking 8) -7 places
16. Megan Fox, 24 (2009 ranking 13) -3 places
17. Kirsten Dunst, 28 (new entry)
18. Emma Stone, 21 (new entry)
19. Anne Hathaway, 27 (2009 ranking 1) -18 places
20. Alia Shawkatt, 19 (new entry)

Helen Cowley, Editor at LOVEFiLM commented: "It's hugely impressive to see such a young list of actresses making their mark this year. Only three of the top ten and one of the top five are over 25 and it's also clear that Brit actresses are having a real impact in Hollywood with the likes of Carey, Emily and Gemma leading the charge. 

"Top star Kristen is a shrewd judge of roles with some clever career choices in recent years, so it'll be interesting to see which direction she goes in after her time as Bella Swan comes to an end.

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