Kit Harington has been in an on-and-off relationship with Game of Thrones co-star Rose Leslie since 2012, which was also the year her character was introduced to the HBO show. By now, they are definitely "on" and engaged.
These On-Screen Couples Were Also Together in Real Life
Kat Dennings and Nick Zano got together in 2011 while shooting Two Broke Girls and were together for three years. After they broke up in 2014, Kat started dating musician and producer Josh Groban - she is currently single. Nick has been with his girlfriend Leah Renee since 2014.