Kit Harington and Rose Leslie will tie the knot in Scotland on June 23.
The couple announced their engagement with a notice in The Times newspaper last September and have now revealed the date and location of their nuptials.
A notice posted at the Huntly registration office in Aberdeenshire, Scotland, which is close to the bride's family home, marks their wedding day as June 23.
The couple met on the set of Game of Thrones, with Harington's character Jon Snow and Leslie's character Ygritte sharing an on-screen romance before Leslie left the show in 2014.
They began their off-screen relationship in 2012 and bought a home together in January last year in East Anglia in the UK.
Harington previously spoke about his proposal, saying he had initially intended on orchestrating a romantic moment, but ended up popping the question a day early.
"I did have some plans to do it; I was going to string up some lights in some trees and do all the romantic stuff, but we were in the country and we were under this beautiful night sky and had a log fire burning and red wine," he told The Jonathan Ross Show.
"I was meant to do it the day after, with the lights [but] I popped my question a bit early."
