Dakota Johnson has said she found watching Fifty Shades of Grey an "eerie" and "painful" experience.

The 25-year-old actress, who plays Anastasia Steele to Jamie Dornan's Christian Grey in the new movie, told OK! magazine, "I've never seen anything like it - but I'm really not that objective!"

She added that seeing the film brought back the "painful" memories of filming, "It wasn't long after we finished shooting so I remember every scene and all the difficulties. Seeing it again was sometimes painful."

Fifty Shades of Grey is in cinemas now.

Click on the video link above to watch our interview with Dakota Johnson.