Richie McCaw's new fiancee has publically tweeted her thanks to all those who'd sent their congratulations to the happy couple.

"Thanks for all the kind words and messages, we really appreciate it and couldn't be happier."

A selfie of the newly-engaged couple shows a rather tanned looking Gemma Flynn with her hand - sporting the sparkling new diamond ring - planted firmly on her man's chest.

The pair's engagement became official on Tuesday evening when Richie McCaw posted the news on his Facebook page, with a picture of the pair celebrating with family.


"Happy new year to everyone. I've had a fantastic start to 2016 and feel very lucky. Gemma said 'yes'! It's been great celebrating our engagement with friends and family in sunny central Otago."

More than 6000 well-wishers across the world posted words of congratulations to his page.