The Hollyoaks stunner, who plays Mandy Richardson on the show, stripped to her knickers to promote the women’s health charity campaign.
Sarah Jayne Dunn, 37, took to Instagram for the cheeky post.
She was seen posing in a pair of knickers adorned with the phrase ‘Foo Foo’ while in her bedroom.
The mum-of-one beamed at the camera as she pointed downward, while also rocking a frilled pink cropped jumper.
“What do you call yours?”
Sarah Jayne Dunn
As well as showing off her undies, Sarah also flashed her washboard abs and body ink.
A second photo showed more pics of the underwear designs.
The knickers were emblazoned with phrases such as ‘poonanie’ and ‘vajayjay’.
Witnessed by her 106,00 followers, Sarah wrote: “#whatdoyoucallyours #foofoo.”
She then added: “The Lady Garden campaign is a national women’s health charity which aims to raise awareness and funds for research into, and treatment of, gynaecological cancers.
“Lady Garden and Stripe + Stare have collaborated this season to raise money and awareness for the five types of gynaecological cancers.
“Go to www.ladygardencampaign.co.uk to purchase your Lady Garden knickers! All proceeds go to the charity.”
Fans were loving the post, with it racking up more than 2,500 likes.
One told her: “Great work,” while another added: “I call it a foo foo too.”
Hollyoaks airs week nights on Channel 4 at 6:30pm, with the First Look episode on E4 at 7pm.