Harington and Leslie started dating after meeting on the set of the series.
"I love that they are matching", one Game of Thrones fan wrote as she saw the best pals arrive together.
She even tied a cream and camel knitted sweater around her shoulders for added comfort on the flight, sweeping her blonde tresses up into a loose bun.
Kit Harrington of Game of Thrones fame has married his fiancee, Rose Leslie, on Saturday in Aberdeenshire, Scotland. But I'm sure they all had a good time'.
The loved-up pair, who met in 2012, were previously on-screen lovers as Jon Snow and Ygritte - and formed a romantic relationship away from the popular HBO show. "We are absolutely thrilled for Kit and Rose to be marrying today", Leslie's father told assembled reporters before the ceremony.
Her pal Maisie Williams, who stars as Arya Stark in Game of Thrones, also looked chic in a black jumpsuit and red shoes.
"The country is attractive. the Northern Lights are magical.it was there that I fell in love", he said.
'It's a great day for Aberdeenshire. "We are using local caterers, local lighting, local flowers", he said.
A love affair that blossomed onscreen between the "Game of Thrones" characters crossed over into real life when the British actors announced their engagement in September a year ago.