The pair enjoyed a dinner date at London’s Rossopomodoro restaurant earlier this month, and engaged in a little PDA at the table, according to TMZ.com.
Seems the couple’s on-screen chemistry, as Jon Snow and Ygritte, may have spilled over into real life.
Game of Thrones is a change of pace for Leslie, 25, a Scottish actress best known for her role as the ambitious but insecure housemaid Gwen on Downton Abbey.
Meanwhile, Harington, also 25, who hails from London, is just getting used to the spotlight, and all the interest in his personal life that comes with it.
“I have a wild streak, but I like to keep that very much for my friends,” he told the Daily Beast earlier this year. “I love going out. I love partying … I can’t be the Kit in public that I might have been once.”