The Galway native, who plays Penelope Featherington in the Netflix series, offered fans a glimpse of the cast interacting between takes with the candid shots.
She wrote: “Bridgerton on Film.
“Still learning so they’re not all amazing but lots of beautiful memories.
“Camera the best gift from @lukenewtonuk.”
Newton plays Coughlan’s on-screen love interest, Colin Bridgerton, and the first image shows the pair together, as she rests her head on his shoulder.
Other snaps show Newton’s on-screen siblings, Eloise Bridgerton, played by Claudia Jessie, and Benedict Bridgerton, played by Luke Thompson.
One photo is of Jonathan Bailey, who plays Anthony Bridgerton, embracing Ruth Gemmell, who plays the family matriarch, Lady Violet Bridgerton, while another features Martins Imhangbe, who plays Will Mondrich, and Emma Naomi, who plays his wife, Alice.
One of the last shots features cast newcomers Victor Alli, who plays Lord Kilmartin, and Masali Baduza, who plays Michaela Stirling.
The second part of the third series dropped on Netflix last week as Colin finally discovered Penelope is the person behind society gossip writer Lady Whistledown.
Both parts of series three are streaming on Netflix now.
Today’s News in 90 Seconds – June 19th
This week, Coughlan became the latest A-lister to model for Kim Kardashian’s underwear brand Skims.
Recent celebrities to have starred in Skims campaigns include England football star Jude Bellingham and pop singer Sabrina Carpenter.
In her modelling debut for the US clothing company the Irish actress can be seen wearing the brand’s soft lounge long slip dress in lemonade as well as the heather grey soft lounge long sleeve dress.
A video posted to the official Skims Instagram shows the 37-year-old amid a pink, ethereal-looking background, as she says: “Everybody’s wearing Skims.”
Reality star Kardashian, 43, co-founded Skims with chief executive Jens Grede, who has also helped with the e-retail offshoot Mr Porter, the denim company Frame, and Tom Brady’s apparel brand Brady.
