The couple grinned from ear-to-ear as they left the church after being annouced husband and wife.
Making their way outside, they were met by their guests who were lined up ready to shower them with flower petal confetti.
The newly-weds got into an old Land Rover which was decorated with paper hearts and tin cans to drive to the reception at Wardhill Castle.
Kit, who plays Jon Snow in Game of Thrones, put on a very handsome display for his big day.
The 31-year-old certainly dressed to impress as he wore a very suave morning suit.
It came complete with a cream waistcoat, grey pinstripe trousers and a black tail jacket.
After he entered the church, Rose Leslie arrived in her incredible wedding gown.
The actress couldn’t have looked happier as she flashed a huge smile whilst holding her father Sebastian’s hand.
Rose’s gown featured intricate lace detail and long sleeves, complete with a stunning veil.
She also clutched on to a simple bouquet of flowers for her wedding ceremony.
Kit and Rose’s Game of Thrones co-stars attended the ceremony with Sophie Turner (plays Sansa Stark) arriving in an unconventional wedding attire.
The actress opted for a red jacket-style mini dress which she teamed with a pair of sexy thigh-high boots.
She arrived with her on-screen sister Arya Stark, who looked chic in a black jumpsuit.
Emilia Clarke (Daenerys Targaryen) also attended and looked sensational in a pink ensemble.
Other Game of Thrones stars who attended included Peter Dinklage (plays Tyrion Lannister), John Bradley (Samwell Tarly), Joe Dempsie (Gendry) and Liam Cunningham (Davos Seaworth).
Before they tied the knot, Game Of Thrones actress Rose’s father said he was “thrilled” for his daughter.
Speaking outside Wardhill castle, Sebastian Leslie said: “We are absolutely thrilled for Kit and Rose to be marrying today.”
The local councillor added: “It’s an absolutely lovely day for us.”
And he said: “It’s a great day for Aberdeenshire. We are using local caterers, local lighting, local flowers.”
Rose, who played Ygritte in the HBO hit series, and Kit met on the set of Game of Thrones in 2012 and started dating after playing each other’s love interest on the show.
Their wedding was based at the the remote Wardhill Castle in Aberdeenshire, Scotland.
The 12th century castle, which is also Rose’s childhood home, had been transformed into an exclusive wedding retreat for the pair.
A marquee had been erected in the spacious gardens for the wedding guests.
Last year, Kit opened up about the moment he fell in love with Rose whilst they were away filming Game of Thrones.
The 31-year-old it was “easy” to fall for his now wife-to-be when they were shooting shooting scenes for the second season in Iceland back in 2012.
Revealing his best memories on the show, Kit told Vogue Italia: “Because the country [Iceland] is beautiful, because the Northern Lights are magical, and because it was there that I fell in love.
“If you’re already attracted to someone, and then they play your love interest in the show, it becomes very easy to fall in love.”