The pair belted out Fairytale of New York

Saoirse Ronan stopped by the Tonight Show with Jimmy Fallon last night to chat about all things Christmas.

The actress decide to show the chat show host how we celebrate the festive season in Ireland, explaining that we enjoy a pint of Guinness and a good sing song.

They both belted out the classic 'Fairytale of New York. Have a look at the full video below.