Forbes reveals Hollywood's young power players

Blake Lively has topped Forbes list of 30 under 30. Photo / AP

Actress, entrepreneur and new mother Blake Lively has topped Forbes' annual 30 Under 30 list.

Emma Watson, Ellen Page and Emma Stone also made the annual roll call of young trailblazers.

Lively, 27, who has appeared in films Green Lantern and Savages, recently launched lifestyle brand, Preserve.

She says she always wanted to own her own company and put that dream on hold while she was starring in teen drama Gossip Girl from 2007 to 2012.

"I knew as soon as that show was over I wanted to, I wanted to pursue my original passion, which was having my own company, which was having a company that incorporated all of the things that I love in life," Lively told Forbes magazine.

"There is not one element of the site that I don't touch.

Lively says she isn't going to let her success go to her head.

"I will never feel like I've arrived," she said.

"I hope to never, ever, ever be complacent because I think that that's one of the most tragic things that I could ever be."

Lively reportedly gave birth to her first child with husband Ryan Reynolds just before the new year.

Watson was named a UN Women Goodwill ambassador and gave a speech that went viral in 2014.

The 24-year-old appeared in films The Bling Ring and Noah and graduated from Brown University too.

Stone's name has been thrown around for a possible Best Supporting Actress Oscar nomination for her performance in Birdman.

She made her stage debut late last year as Sally Bowles in Cabaret.

Hollywood star Keira Knightley's performance in The Imitation Game has also generated Oscar buzz. She will also star and produce the film adaption of Suzanne Rindell's novel, The Other Typist.

Page kicked goals on screen in 2014 but it was her coming out speech, viewed more than five million times on YouTube, that gained the most attention.

Her first film as a producer, Into The Forest, is due out this year.

-AAP