This comes days after the second part of the latest season of Netflix hit Bridgerton starring Coughlan as Penelope Featherington, aired on the streaming service.
Modelling the items, Coughlan can be spotted wearing the brand's soft lounge long slip dress in lemonade, along with the heather grey soft lounge long sleeve dress.
In a video shared via the official Skims Instagram account, Nicola Coughlan can also be heard saying: "Everybody’s wearing Skims".
Nicola Coughlan follows on from other celebrities who have modelled for Kardashian's brand, including pop star Sabrina Carpenter, and English footballer Jude Bellingham who recently scored the winning goal in England's victory in their first game of Euro 2024 against Serbia.
Skims was co-founded by Kim Kardashian along with chief executive Jens Grede. Grede has also worked on the e-retail offshoot Mr Porter, Tom Brady's apparel brand Brady, and denim company Frame.