Prime Minister Jacinda Ardern has encouraged people grieving for her cat Paddles, who was struck by a car, to support the SPCA.

Ardern said on Facebook: "To anyone who has ever lost a pet, you'll know how sad we feel. Paddles was much loved, and not just by us. Thanks for everyone's thoughts. And on behalf of Paddles, please be kind to the SPCA. They found her before we did, and we will always be grateful for that."

A spokesperson for the Prime Minister had earlier confirmed: "Yes, sadly Paddles has died after being run over by a car near the Point Chevalier home of the PM yesterday evening."

Paddles, a ginger SPCA cat, had become a celebrity in its own right, and a Twitter account had been established in its name.

The creator of Padddles' Twitter account said Gayford asked that people make a donation to the SPCA if they wished to remember the feline.

Ardern had joked that Paddles was a "polydactyl", with extra claws that look like opposable thumbs, and ran the account itself.

The account tweeted this morning: "V sad PR Guy here. Tysm for loving Paddles, the whole world will mourn her. Not bad for a lil SPCA puss."

Ardern's partner Clarke Gayford said Paddles had nearly derailed her call with US President Donald Trump by running into the room and miaowing loudly.

As the call was transferred our cat (yes that bl***y cat) came flying through the cat-flap. She leaped up onto the chair next to Jacinda and began announcing her very squawky arrival. There was a flurry of action as I tried to hustle it into the next room while quite literally the leader of the free world was connected through to our little home in Pt Chev."

Gayford had expressed surprise at Paddles' rise to stardom, noting that a friend had sent him an article about his cat in a Danish newspaper.

Even the Huffington Post described Paddles as "the most powerful cat In New Zealand".

Vanity Fair had also reported on Paddles' fame.

Ardern also lost her grandmother recently, attending her funeral on the final day of the election campaign.

Social media has lit up as people posted their feelings about the loss of Paddles.

Adrian Jenkins: "So sad! Bring on a state funeral and we need a replacement ASAP. We have to have a first cat!"