Jacinda Ardern named in Fortune's '40 under 40' list

The magazine described her as a 'rock star of New Zealand politics.'

Prime Minister Jacinda Ardern has been named in Fortune magazine's '40 under 40' list.

Ardern, 37, was listed at number 12 in the list, which is headed by Facebook founder Mark Zuckerberg and Instagram co-founder Kevin Systrom.

Fortune magazine said Ardern, a one-time DJ, became a "rock star of New Zealand politics."

"Her fervent support among Kiwis, dubbed Jacindamania, helped reverse her Labour Party's ailing fortunes this fall and catapulted her to the title of world's youngest female leader," Fortune magazine said.

"The buzz continued when she announced her pregnancy and in June painted a once-in-a-generation vignette: a female head of government, cradling her newborn and embarking on six weeks of maternity leave.

"Her time off is flexible, it seems. In July she announced welfare reforms - including a weekly stipend for new parents -as part of Labour's promise to improve well-being in a nation that's grappling with housing and immigration crises."

Her partner, Clarke Gayford, took to his Twitter to share the exciting news.

"So, this just happened," the tweet read.

"I mean I was just pleased I had paid my student loan off by 40...."

Jacinda Ardern and Clarke Gayford at The Queen's Dinner during The Commonwealth Heads of Government Meeting earlier this year.

Ardern also made Time Magazine's list of the year's 100 most influential people earlier this year.