Ryan Gosling and Rachel McAdams
Ryan Gosling and Rachel McAdams played out one of the most romantic stories of all time, so it's hard to imagine that these two did not like each other. Believe it or not, there was a time where they didn't get along!
Gosling even asked for a new actor to help do off-camera lines with because he just didn't "feel" anything for McAdams. The director put them in a room together, told them to work it out, and, well, the rest is history.