Sunrise's Sam Armytage has won an apology over the 'granny-undies' story.

Sunrise presenter Samantha Armytage has received a public apology from Daily Mail Australia after she threatened the publication with a defamation lawsuit over their so-called ‘undie-gate’ story.

On Sunday, the website ran paparazzi photos of the 40-year-old TV presenter running errands in Sydney, headlining the piece, “Sam Armytage’s giant granny panties show a visible line.”

On Tuesday morning, they bowed to pressure and amended the article by removing all written references to Armytage’s underwear — but kept the controversial photographs.

The headline was changed to: "Casual Sunday! Sunrise host Samantha Armytage goes solo as she heads out on a shopping trip after slamming rumours about her dating life."

An apology was also added to the end of the article.

An earlier version of this story contained critical statements regarding Samantha Armytage’s appearance. While the story has since been amended, we apologise for any distress caused to Ms Armytage or readers more generally.

The rare move came after Armytage had demanded an apology and for the original article to be immediately retracted.

In a three-page letter issued to the Daily Mail’s editor Luke McIlveen and writer Max Margan and released exclusively to News Corp, lawyers for Armytage wrote that the website's consistent reporting on her private life, dating history and now choice of underwear should not "be the subject of media exposure and comment”.

"Ms Armytage is at a loss to understand the reasons why Daily Mail Australia has chosen to publish this article, which represents a gross invasion of her privacy,” Armytage's lawyer Justine Munsie argued, according to News Corp.

“Ms Armytage accepts that she is a public figure and it follow that she is subjected to a great deal of media attention, including by way of rumour and innuendo, such as the misinformation as to whom she is 'dating' which is also referred to in the article.”

It was also widely, but incorrectly, reported on Saturday that Armytage was dating fellow Channel 7 journalist Peter Fegan.

At the time, Armytage released a statement on Instagram urging "all of you half-sensible people out there not to read/buy this rubbish."

However, in the letter addressed to the The Daily Mail, lawyers for Armytage argue interest in her love life has surpassed natural curiosity, as it appears the website "now seems determined to humiliate and shame her in the most base and personal way.”

Additionally, the letter acknowledges the deep-seated rivalry between Nine's Today Show and Seven's Sunrise, hinting that they recognise a former employee of Today is now working for the Daily Mail.

“It has not escaped our client’s attention that the Daily Mail’s social media manager was formerly employed as a producer on the Nine Network’s Today Show which is a major competitor of Seven’s Sunrise," the letter reads.