A number of co-stars have been in attendance, together with Emilia Clarke, Sophie Turner, Maisie Williams and Peter Dinklage.
Harington performs Jon Snow on the hit HBO collection, which is able to air its last season subsequent yr.
Leslie portrayed Ygritte, a brave warrior and Snow’s on-screen love curiosity, till the character was killed off within the fourth season. (WarnerMedia is the mum or dad firm of each HBO and CNN.)
The actors, who’re each 31, have been courting for a number of years however have saved their relationship pretty low key.
They went public as a pair in 2016 on the purple carpet on the Olivier Awards in London.
In October, Harington admitted his proposal was a bit extra subdued than he had initially deliberate.