The actress told ITV's This Morning that she went shopping with the soap's stylist to ensure the right wedding gown was picked for her character's big day.
"I went and helped get the wedding dress because obviously I know my character inside and out, so I went along to help choose the dress," she explained.
"It's not something I would [pick], it's probably a bit bigger than something I would choose but it's very much what she would choose."
Kym also teased of the wedding reception: "I think it's not going to be anything grand so I think we can probably work out where the reception is going to be."
The soap star appeared on This Morning just a few days after confirming she's temporarily separated from fiancé Dan Hooper as they work through some issues.
She said on the show: 'We are both going through a really difficult time and it's tough obviously because there is that media spotlight but we've had a lot of support from our family and friends and that's been invaluable to us both.
"I think our priorities are our children, we're both kind of focusing on our kids and work at the moment."
They began dating in 2013 and became engaged last year.
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