Jacinda Ardern, the Prime Minister of New Zealand, has tested positive for Covid-19.

Since her lover Clarke Gayford tested positive for Covid-19 on Sunday, Jacinda Ardern has been in isolation.

New Zealand Prime Minister Jacinda Ardern tested positive for Covid-19 on Saturday, with moderate symptoms, according to her office.

She will miss the government's emissions reduction plan on Monday and the budget on Thursday, according to the statement, but "travel arrangements for her trade mission to the United States remain unaffected at this time."

It stated Ardern had been unwell since Friday evening, with a faint positive at night and a definite positive on a fast antigen test on Saturday morning.

According to the report, she has been in seclusion since Sunday, when her partner Clarke Gayford tested positive.

Ardern will be compelled to isolate until the morning of May 21 due to the positive test, doing whatever duties she can remotely.

A post shared by Jacinda Ardern (@jacindaardern)

On Monday, Deputy Prime Minister Grant Robertson will speak to the media in her place.

"I'm gutted I won't be there for this historic week for the government," Ardern said in a statement.

"Our emissions reduction plan lays the groundwork for us to accomplish our carbon zero objective, and the budget addresses the health system's long-term future and stability," she said. "However, as I mentioned earlier in the week, isolation with Covid-19 this year is a very Kiwi experience, and my family is no exception."

On Saturday, Ardern also revealed that her daughter, Neve, had tested positive on Wednesday.

"Unfortunately, despite my best attempts, I've joined the rest of my family and tested positive for Covid-19," Ardern wrote on her official Instagram page.