Vicky McClure, 36, was reunited with her Line of Duty co-stars Martin Compston and Adrian Dunbar last night.
The English actress, who plays Detective Inspector Kate Fleming in the BBC One police drama, snapped a selfie with the pair during a night out.
The off-duty stars headed straight to the pub for a catch-up before work gets underway on season six of the gripping television series.
Vicky captioned the snap, which she shared with her 262,000 Instagram followers: “Hiya!”
Wearing her short blonde hair swept to one side, Vicky sported a huge grin on her face as she posed for the picture in the street.
The actress, who has appeared in the popular TV show since 2012, was joined by her on-screen colleagues Martin, 35, who plays Detective Sergeant Steve Arnott and Adrian, 61, who portrays Superintendent Ted Hastings.
One user remarked: “AC12’s finest” in the comments section.
Scottish actor Martin, who regularly shares behind-the-scenes pictures from the show on social media, also shared an image from their reunion on his own account, in view of his 163,00 followers.
He captioned a photograph that shows the trio in the pub: “Cannae beat a catch up with these two.”
“Next time we’ll most likely be in uniform or at least Adrian will I’ll be in a new 3 piece”.”
Over the years, Line of Duty viewers have watched the AC12 team try to uncover the identity of corrupt officer “H”.
Fans thought the picture had revealed a huge spoiler as Adrian, aka Hastings, was sporting a blue coat with the letter “HH” on the front.
Many headed straight to the comments section to share their thoughts.
One user wrote: “Look at his jacket!!!”.
Another added: “Hastings even has H on his jacket”.
A third remarked: “Double H!!!! Spoiler alert!”