Tina McIntyre (Michelle Keegan) and Rita Tanner (Barbara Knox) are to come to blows during next week's episodes.
In scenes to be shown on Monday 26 May, Tina will confess to her long-standing friend that she's having an affair with Peter Barlow (Chris Gascoyne). But a horrified Rita will respond by slapping Tina across the face.
"That's our final scene together," reveals Michelle Keegan. "All those years working together, then she slaps me and I'm off. When I think of all the times Rita has hugged Tina and given her advice. And now Rita wallops her and it's the last time she sees her."
Keegan is set to leave Coronation Street in the coming weeks, with Tina sensationally killed off as part of a high-profile storyline. For the actress, it means having to say goodbye to cast-mates with whom she's grown particularly close, including Street stalwart Knox:
"I am really close with Barbara," continues Keegan. "When I have a scene with Barbara, I know it's going to be really good. From day one, she's always been professional and taught me that I needed to learn my lines and always be on set on time. She's very good like that. Even now, she'll still give me advice about delivering a line if she sees that I'm struggling. She'll say, 'try it like this' and it always works. And we'll have a gossip every now and again in her dressing room. I'll miss Barbara."