‘Supernanny” Jo Frost is put ting her long-running show in permanent time out.

British TV star says that this is her final season — because she would like to start a family of her own.

“I have decided to hang up my cape,” she told The Post this week. “It was a very conscious decision, through much reflection. But I need to create more balance in my life.”

The 39-year-old kid whisperer has been living out of a suitcase since she began in 2004 traveling in Britain and America, defusing temper tantrums.

Though she’s now worth tens of millions (the show has spin-offs in 47 countries), Frost hasn’t found time to buy a home of her own. She still bunks with her dad during trips home to the UK, she says sheepishly.

Having children “is not an option when you are traveling and working 46 weeks out of the year,” says Frost, who is single and currently without a boyfriend.

“Proper balance will allow me to date and have a relationship and look at my own future of having a family.”

“I am definitely excited about dating and being in a committed relationship. That is all exciting stuff for me around the corner.”

For the past six years, Frost — who became the Supernanny by responding to an open casting call — has been a textbook workaholic.

What began as a pop-culture punch line — “the naughty step” has become a lifesaver for families with out-of-control kids — has evolved into a carefully managed brand.

In addition to working with 115 families over the life of the show, she’s written three bestsellers (a fourth book focusing on toddlers is due next year) and toured two continents delivering seminars to thousands of harried parents.

“I am passionate about my work,” Frost says. And that won’t change, even with the end of “Supernanny.”

“I will certainly not be giving up what my public service is to America and the world,” she insists. Frost is developing several new TV projects and says there is “much interest” in bringing her current UK series, “Extreme Parental Guidance,” here.

“I don’t think you will be seeing less of me,” she says. “I just think it will be a different way that you see me.”