The Game of Thrones actor, who plays Jon Snow, and his former co-star, who played his Wildling lover Ygritte, tied the knot on Saturday in a church service near the Wardhill Castle in Aberdeenshire, Scotland, according to reports.
The Aberdeen-born bride, wearing a flowing ivory gown and veil, arrived nearly an hour later with her father, Sebastian Leslie, in his Land Rover.
Although specific plans about the wedding have not been made public, they could Wednesday at Wardhill Castle, which is owned by the Leslie family.
The bride's father, Sebastian Leslie, said Saturday he was "absolutely thrilled" about the wedding. "It's an absolutely lovely day for us", he told the BBC.
And he said: "It's a great day for Aberdeenshire".
Harington and Leslie, who starred as love interests Jon Snow and Ygritte from seasons four through six on the HBO series, found love in real life, and got engaged last September after five years of dating.
The British beauty, 31, wore a statement pink top atop a plunging corset style dress which teased a look at her cleavage.
Harington and Leslie met on the show in 2012.
In an interview, Harington revealed his best memory of Game of Thrones was meeting Leslie and falling in love while filming in Iceland.
"The country is attractive. the Northern Lights are magical.it was there that I fell in love".