Clarke Gayford praises his 'favourite achiever in the whole wide world' - fiancé Prime Minister Jacinda Ardern - on her 40th birthday

Clarke Gayford/Instagram Jacinda Ardern
Jacinda Ardern and Clarke Gayford. Photo credit: Clarke Gayford/Instagram

Clarke Gayford has joined a chorus of well-wishers celebrating the 40th birthday of the Prime Minister. 

In an Instagram post, Gayford - TV host and stay-at-home dad to their daughter Neve - gushed about his partner, saying Jacinda Ardern is his favourite achiever in the world. 

"I don't really do these posts, but I think a bit of symmetry like the number 40 is worth posting on," the 43-year-old wrote.

"Happy Birthday today to my favourite achiever in the whole wide world, someone, who despite everything on her plate, still finds time to squeeze lots of fun, love and happiness into our wee family unit."

In the photo, Ardern is wearing big sunglasses and a woolly hat. 

Sunday was Ardern's birthday.

While Gayford said he doesn't "really do these posts", this isn't really true - he posted a picture of a cake for Neve's second birthday in June and a picture of a card for Mother's Day in May.

Gayford and Ardern got engaged last year over Easter after six years of dating.