Janet Jackson has become a billionaire.

The 'Rhythm Nation' hitmaker has hit a lofty milestone, with her personal wealth exceeding more than $1 billion this year, following an incredible career in entertainment spanning four decades, according to Variety.

The 47-year-old star - whose brother, the late King of Pop Michael Jackson, also amassed a vast fortune over the course of his career - is thought to have made her windfall from years of touring, album sales and roles in movies such as 'The Nutty Professor II'.

Janet reportedly made $458 million from various concert tours, a further $304 million from movie roles - including the Eddie Murphy comedy and Tyler Perry's box office hit, 'For Colored Girls' - as well as $268 million in album sales and $81 million in endorsement and sponsorship deals.

The famous Jackson sibling joins an elite club of celebrity billionaires including talk show queen Oprah Winfrey, legendary film director Steven Spielberg and 'Harry Potter' author J.K. Rowling.

As well as her own fortune, Janet shares the wealth of her billionaire tycoon husband Wissam Al Mana.

The 'Control' singer secretly wed the retail magnate, who earned his fortune investing in the Middle East, last year.

Although Janet's career has put her musical career on the backburner in recent years, the singer is planning a comeback this year to mark the 20th anniversary of her iconic album, 'janet'.

She said earlier this month: "I am working on a new project now. We are creating the concept and initial thoughts on the music."