Saoirse Ronan and Jimmy Fallon performed 'Fairytale of New York' on a recent episode of 'The Tonight Show'.
Saoirse was on the show to promote her new film Mary Queen Of Scots, which is out over here in the new year.
Jimmy and Saoirse wore scarves and belted out the classic Christmas song in the setting of a lock-in at a traditional Irish bar.
Watch the full video below:
Do you think they did it justice?
