ADVERTISEMENT
2. Nathan Fillion and Stana Katic
The hottest novelist and detective of the year couldn’t stand each other. They despised each other so much that the two had to attend couples counselling together. You would think that with their perfect on-screen chemistry, everything would be great off the screen as well. Think again! Nathan Fillion and Stana Katic from Castle had such a major feud with one another that they both started to be a pain for everyone else on the set as well. Their hate for each other went so deep that they refused to converse with each other off-screen which went on for many years.