Sian Powers receives an unexpected proposal from girlfriend Sophie Webster in tonight's double bill of the soap and is immediately excited over the idea of taking their relationship to the next level.
However, Sophie (Brooke Vincent) is hiding a secret as her decision to pop the question is partly influenced by guilt after rebellious Amber Kalirai (Nikki Patel) recently kissed her during a night out.
Parkinson told Celebs on Sunday of the storyline: "Sophie proposes because she's confused by the feelings she's having for Amber. She decides the one thing that will keep her and Sian together is if they get married. But their parents aren't exactly on board, so it looks like things aren't going to go very smoothly.
"I'm not sure what's going to happen after that, but I've heard there's a big wedding in a church with two wedding dresses just in time for Christmas. I'm so excited!"
Meanwhile, discussing the response to the character of Sian, she said: "Generally I get quite a nice reaction. People ask for pictures and that kind of thing. Quite often someone will shout, 'There's that lezza out of Corrie'. But I think that's dead funny, I don't think they mean any harm by it."
Parkinson recently decided to leave Coronation Street and her exit is expected to tie in with the current Sian, Sophie and Amber love triangle.
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Watch a video preview of tonight's Coronation Street double bill below: