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The pair dated briefly last year but recently reunited following a chance meeting at a children's reading group.
Cavanagh told News & Star of her alter ego's future: "Well, she's fallen in love and is just about to move in with Brian. Hopefully there are going to be some big storylines for her.
"They are going to stay together. Julie has got a good man - I will be severely disappointed if I can't get a wedding dress! Though she may have to drag Brian down the aisle."
Discussing how Julie has changed, the actress continued: "I'm not sure she has toned down, but I've had more opportunity to flesh her out and make her more three-dimensional and this year I have really found my feet with her."
Julie and Brian (Peter Gunn) were today tipped to become UFO spotters in a forthcoming storyline.
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