The actress, who plays Eva Price, will stay in the ITV1 soap until next year and will be involved in major storylines in the coming months.
"I'm having an incredible time. I've had my contract extended until next year and I've been told that Eva has got some very big things coming up. I've got a meeting next week where I will find out what they've got planned for her and I can't wait," Tyldesley told the Daily Star Sunday.
"It's all very exciting and I'm really looking forward to getting the next batch of scripts just so I can find out what happens to her. When Eva first turned up in the street she'd just discovered that her fiancé had been cheating on her so she was a bit of a grumpy soul for a while.
"She was a little bit catty and definitely a woman scorned. But since she's got with Nick Tilsley we've seen her softer side develop. She's fallen for him in a big way and it's been nice to show that side of her."
Tyldesley added that she wants something tragic to happen to Eva so the character can "show people what she's made of".