"We are absolutely thrilled for Kit and Rose to be marrying today". Harington arrived ahead of the ceremony, looking suave in his mixed-colored tux and his long Jon Snow hair. She was given away by her father Sebastian, who was dressed in a traditional Scottish kilt.
The 31-year-old stars are reported to be tying the knot in northeastern Scotland, with co-stars Emilia Clarke, who played Daenerys Targaryen, and Peter Dinklage, who played Tyrion Lannister, arriving at nearby Aberdeen on Friday.
After the church wedding, guests made their way to Wardhill Castle for the reception, a stunning 12th century venue owned by Rose's family.
Harington, wearing a morning suit, arrived earlier on Saturday afternoon. (Jane Barlow/PA via AP) Kit Harington and Rose Leslie reacts as they leave after their wedding ceremony, at Rayne Church, Kirkton of Rayne in Aberdeenshire, Scotland.
Harington still stars on the show, while Leslie appears on United States legal drama The Good Fight.
They announced their engagement in the London Times a year ago and are expected to marry at Wardhill Castle.
"I rang him up and I said, "I'm getting married and it's your fault actually, '" he said, referring to the fact that he and Rose met and fell in love on the set of the HBO series before she left the series after Season 4".
The Good Fight actress Leslie said she had been too busy to plan the wedding, telling Town And Country magazine: "I haven't tackled it".
On the work front, Kit Harington is all set to reprise his role of Jon Snow in the eighth season of Game of Thrones.