Grey's Anatomy creator Shonda Rhimes has said the finale of the current season will be "very painful and shocking".

Warning: spoiler alert!

In an interview with Entertainment Weekly, Rhimes was asked about the death which she has already said will occur in the season finale.

She replied: "I knew we were coming to this place and to this story and to this episode, and I had been dreading it for months, literally."

She continued: "We had to write the episode. If I step back and look at it from the outside, I think it's going to be a very painful and shocking episode for people.

"From the inside, it's a very painful and shocking episode. It's not anything that you expect, and it doesn't have any of the resolutions that you expect. And the reason why I wanted to say something about it before it came out is because I wanted people to be prepared. I felt like it was unnecessarily cruel for you to think that everything was going to move along happily. I wanted people to be prepared for the idea that something bad is going to happen."

Asked for a "final warning" for fans about the finale, Rhimes said: "I think it's going to be hard to watch. I think there are going to be some aspects of this that are going to be very hard to watch, and I think there are going to be some moments that are fairly stunning in terms of people wanting to throw things at their television set or at me.

"But I did what I had to do. I did what was necessary in order to tell the story that we needed to tell and tell it in the way we needed to tell it and to take us into next season the way we needed to be led there."