New Zealand's Prime Minister Jacinda Ardern has cancelled her wedding after announcing new Covid restrictions.

Axar.az reports that the entire country is set to be placed under the highest level of Covid restrictions after an outbreak of the Omicron variant.

The restrictions include a cap of 100 vaccinated people at events and mask wearing in shops and on public transport.

New Zealand has recorded 15,104 Covid cases and 52 deaths.

Ms Ardern confirmed to reporters on Sunday that her wedding to television host Clarke Gayford would not be going ahead.

"I am no different to, dare I say it, thousands of other New Zealanders who have had much more devastating impacts felt by the pandemic, the most gutting of which is the inability to be with a loved one sometimes when they are gravely ill," she said.

"That will far, far outstrip any sadness I experience," she added.