The Downton Abbey star, who we're used to seeing dressed in her uniform as Anna Bates, really turned on the charm in a sexy bandage dress.
It was their affair — which began with a handsy encounter against a wall — that got viewers talking.
Critical eye: The pair appeared to check a pictures on James' phone as they watched The Killers perform on Saturday afternoon The blonde's husband James looked suave in a printed blue shirt and skinny white jeans.
Joanne Froggatt is married to her long-time boyfriend James Cannon in 2012, but they got Separated in February 2020.
From 2010 to 2015, she portrayed anna bates in the itv period drama series downton abbey.
She may be best known for her role as a Lady's maid in Downton Abbey, but Joanne Froggatt looked every inch the glamorous A-lister on the red well actually, it was blue carpet at the London premiere of her latest film, Filth.