The actress, who plays Eva Price in the ITV1 soap, said that she will be voting for co-star Michelle Keegan (Tina McIntyre) to win.
"I'm still in shock. I was speechless when I found out. I don't expect anything at all to happen but it's very, very flattering having been nominated. Eva is a very sexy character. She uses her sexuality to get what she wants but I don't see myself as sexy at all," she told the Daily Star Sunday.
"I actually vote for Michelle Keegan every year and that won't be changing. She's just so beautiful that I find myself just staring at her sometimes. She comes in first thing in the morning and still looks so ridiculously beautiful. She just looks amazing.
"It's just so weird to be nominated in a category with somebody who is just so incredibly beautiful. When I think about it all it's just so ridiculous. So it is a little bit strange but it's really sweet and very nice. Eva is a lot more daring than I am when it comes to the clothes she wears."
Tyldesley added that she has a "feeling" Eva's relationship with Nick Tilsley may be about to hit trouble as they're "just too happy at the moment".
The actress's Coronation Street contract was extended in February, meaning she will stay in the soap until at least next year.