The 'Line of Duty' cast have had their first read-through of the script for series six.
Line of Duty cast reunite (c) Instagram
Vicky McLure - who plays Detective Inspector Kate Fleming - shared a picture with her co-stars Adrian Dunbar (Superintendent Ted Hastings), Martin Compston (Detective Sergeant Steve Arnott) and new guest star Kelly Macdonald (Detective Chief Inspector Joanne Davidson) on Instagram to mark their first day back to work on the cop drama.
She captioned the post: "Back to work for this lot at the #LineOfDuty Series 6 read-through!"
Martin added to his own profile: "It's a lovely morning in London town.
"Going to meet some old friends, possibly look at some script and then I'm going waistcoat shopping. Haha, we're back!"
The upcoming instalment will see 'Trainspotting' star Kelly play the senior investigating officer of an unsolved murder, whose unconventional conduct raises suspicions at AC-12.
'Line of Duty' showrunner Jed Mercurio previously promised that Kelly's alter ego will be an "enigmatic adversary" for Vicky McClure, Martin and Adrian's characters in the BBC One show.
Jed said: "We're honoured that Kelly Macdonald will join Martin, Vicky and Adrian in Series Six of 'Line of Duty'. DCI Joanne Davidson will prove the most enigmatic adversary AC-12 have ever faced."
Piers Wenger, Controller of BBC Drama, added: "We're delighted that Kelly Macdonald is coming on board for series six. She's one of the UK's most versatile actors and we're excited for viewers to see what Jed's scripts have in store for her when she joins the Line of Duty team."
'Line of Duty' Series Six is also set to feature more guest stars, who are yet to be announced.
Jed said he hopes the next series will be aired "sometime in 2020".
He said: "I would hope its sometime in 2020, next year. But that's not something we're able to confirm."
Tagged in Vicky McClure Kelly Macdonald Martin Compston