Their characters were lovers on the hit HBO show and also developed feelings for each other off-set.
Harington, 27, and Leslie, 27, started dating in 2012 and took things slow.
Their friends revealed the two were having fun but were not “moving in together” or anything. Harington and Leslie broke up in 2013 only to spark dating rumors again in 2014 when they were seen looking cozy at LAX, but split up again later that year.