They're preparing for the release of their film Last Christmas which is based on the music of George Michael.
And Emilia Clarke and Emma Thompson managed to sneak in a bit more festive fun as they turned on the lights at Covent Garden market in London on Tuesday.
Game Of Thrones star Emilia, 33, put on a very animated display as she stood under snow while Emma, 60, looked fantastic with her second bold hair style of the week.
Having fun: Emilia Clarke, 33, put on a very animated display as she switched on the Christmas lights at Covent Garden market in London on Tuesday night
Emilia appeared to be in good spirits as she turned on the lights and sang Last Christmas with the rest of her upcoming movie's cast.
The actress wore a long crisp white coat with statement shoulder pads and several buttons on the front to keep warm during the outside event.
She completed her elegant look with a bold red lipstick and sparkly earrings which stood out against the stunning jacket.
Festive: Emilia and co-star Emma Thompson, 60, wrapped their arms around each other as they sang Wham!'s hit Last Christmas at the event
What a do! Emma revealed her new pink locks as she turned on the lights with Emilia and co-star Paul Feig. On Monday the actress sported glittery blue stars in her hair
Emma, who wrote the script for Last Christmas with her husband Greg Wise over eight years, also wrapped up warm for the event in a faux fur jacket.
The star also donned a white roll-neck jumper and red lipstick just like Emilia as the pair took to the stage in Covent Garden.
She also revealed her new pale pink hair which stood out in the crowd and wore her locks swept back off her face.
Stunning: Emilia looked fantastic in a long white coat which boasted statement shoulder pads and buttons down the front
Big event: Emilia wore all white for the event while Emma opted for a faux fur jacket and black and white patterned trousers
Smiles: The British actresses were in good spirits as they laughed and joked on stage together
Yesterday Emma was seen sporting another eye-catching do when she attended the UK premiere of the film with blue glittering stars in her blonde hair.
The stars matched Emma's furry trouser suit, which comprised of flared bottoms with slits up either