Fashion designer Carly Cushnie, actress Kate McKinnon and videogame creator Kim Swift may not be household names yet, but they are destined to do great things and will be tomorrow's young stars, Forbes magazine said on Monday.

Along with Olympic Gold medalist gymnast Gabby Douglas, rapper Wiz Khalifa and researcher Josh Sommer, they have been chosen by the magazine for its "30 Under 30" list of top achievers under 30 years old in their fields.

They are considered the top 30 achievers in 15 categories ranging from education, energy, music, science and healthcare to sports, technology games and apps and marketing.

"This is a celebration of youthful ambition and success. These are really amazing people and they are doing amazing things. It makes you very hopeful about the world," Michael Noer, executive editor of Forbes, said in an interview.

Many on the list, including singers Bruno Mars and Justin Bieber, as well as actresses Ashley and Mary Kate Olsen and fashion designer Alexander Wang, the newly appointed creative director at the French fashion house Balenciaga, are already well known.

Some are returnees to the list that was launched last year - like British singer and new mother Adele, the 24-year-old multiple Grammy Award winner, and American entrepreneur Kevin Systrom.

Noer said there has been a 60 percent turnover since 2011, so there are plenty of new faces on the list drawn up by Forbes staff and industry experts.

"I think there are a lot of interesting names on the list," he said.