Jackson and his co-producer wife Fran Walsh have came under fire from fans of the book for failing to depict Ronan's tragic Susie Salmon falling victim to the horrific act.
Ronan agreed with their decision - and admits she is baffled by anybody wanting to watch the harrowing scene.
She says, "To be honest, I really don't know why anyone would want to see a 14-year-old girl raped in a movie and killed.
"I feel very strongly about this. That's certainly not the type of movie that... (we) wanted to make. And Peter Jackson or not, that was not the kind of movie that I would want to be in. Plus, Susie actually runs away from her murder so the story is fuelled by that. By her going on this journey to trying to understand what happened to her body.
"That scene is very, very intense. So I think if we had put something else in, anything else, it would have completely overwhelmed the story."