The 29-year-old looked festive in her clinging red dress, which accentuated her newly slim figure as she arrived at the bash in Manchester.
Despite dropping a whopping three dress sizes Catherine, who is dating her personal trainer Sam Witter, has managed to hang onto her curves, showing them off in the low cut sparkling dress.
Festive treat! Catherine Tyldesley lights up Corrie's Christmas party in her red dress
Luckily the youngster had on thick black tights which protected her modesty.
Her backless green party dress is a change from her characters dowdy usual wardrobe.
Their Marilyn moment! Catherine and Paula Lane, who plays Kylie brave the blustery conditions
Christmas angels: Corrie starlets Catherine and Paula look festively fabulous
With her tousled blonde hair the actress looked like she was ready to light up the room at the bash and she accessorised her tight dress with nude heels and gold clutch bag.
Catherine's glitter detail added some festive spice to her outfit and with her red lipstick it was obvious the actress takes the Christmas party season seriously.
She's not crackers! Catherine giggles as she prepares to enter the bash in her red glitter detail dress
Full of festive cheer: Catherine hasn't lost her curves despite dropping the pounds
Isn't it a bit early for dancing? Catherine gets her moves ready for some Christmas songs at her work party
She recently said: 'He helps me so much when it comes to what to eat and exercising. It means so much to me to be able to help others because I know how hard it is.'
Although the actress looked in a playful mood as she giggled on arrival so perhaps as a Christmas treat she may snaffle some calorific Christmas cake.
Foxy lady! Kym Lomas looked super chic in a tight black dress and Louboutin's
Lady Lomas! Kym sparkles in her tight black outfit with red nail polish and gold buttoned jacket
Kym, who was spotted out Christmas shopping in Manchester this week, looked ultra slim in her tight black dress and she showed off her toned legs in her towering peep show Louboutins.
Her dark hair was pulled back from her face making her look the look years younger.
Brooke does demure? Ms Vincent goes for a Croydon facelift for her work do
Lovely in lace: Shobna Gulati looks pretty pleased with her outfit which perfectly complimented her tiny figure
Party tricks! Shobna and Sol Heras, who plays Ryan Connor get in the festive spirit
The actress, who plays Sophie Webster, also opted for an all black outfit with a leather jacket and fluffy skirt.
Shobna Gulati, who plays Sunita, looked lovely in lace with a v neck pink dress and her long hair piled up in a bun.
The 46-year-old got the prize for having the most festive spirit as she grinned at onlookers before heading in to party.
Party people: BFFs Jennie McAlpine and Anthony Cotton look glam but casual as they arrive at the Hilton