The actors, both 31, are thought to be marrying in Leslie's 12th century family castle in Scotland on Saturday.
Kit Harington and Rose Leslie's wedding isn't coming-it's officially here! Harington, wearing a morning suit, and Leslie, in a flowing ivory gown and veil, smiled at members of the public who had gathered outside the church.
"The country is attractive. the Northern Lights are magical.it was there that I fell in love", he said. The wedding date had previously been posted at Aberdeenshire's Huntly register office. She was given away by her father Sebastian, who was dressed in a traditional Scottish kilt.
They announced their engagement in the London Times previous year and are expected to marry at Wardhill Castle.
Kit and Rose, who played doomed Jon Snow and Ygritte on the hit HBO show, exchanged vows in the Kirkton of Rayne church in Scotland. Her father Sebastian Leslie, an Aberdeenshire councilor and the chief of the ancient Leslie Clan, dressed in a traditional Scottish kilt, escorted her. Harington wore a long black jacket over a cream vest, white shirt, black tie and gray pinstriped trousers.
Harington and Leslie met on the show in 2012.
Keep clicking for more photos from Harington and Leslie's star-studded wedding day. "They (the cast) have all got to be there so the whole thing has got to shut down".