Jimmy Fallon & Saoirse Ronan Perfrom Duet of the Pogues' 'Fairytale of New York'!

Saoirse Ronan and Jimmy Fallon got in the Holiday spirit, Irish pub-style on last night’s (December 4) The Tonight Show with a duet performance the Pogues‘ “Fairytale of New York“!

The 24-year-old Oscar-nominated actress then hit the couch to talk about the piece she wrote for the “Feminists Don’t Wear Pink and Other Lies” essay collection, has her thoughts narrated by Jimmy, and shows off her best Australian accent.

PHOTOS: Check out the latest pics of Saoirse Ronan

Saoirse also promoted her latest film Mary Queen of Scots and Jimmy tests how big of a Bridesmaids fan she really is by taking a trivia quiz.

Saoirse nails every single question Jimmy threw at her – Watch after the cut!

FYI: Saoirse is wearing a Celine dress, Jennifer Fisher jewelry and Christian Louboutin shoes.

Click inside to watch the rest of Saoirse Ronan’s appearance on The Tonight Show…