Adele stuns fans showing off dramatic weight loss in Christmas party pictures

Adele is proudly showing off her dramatic weight loss since retreating from the spotlight in 2017; sporting a much trimmer figure in her Christmas party photos.

Sharing two black and white festive snaps on Instagram, the 'Hello' hitmaker looked barely recognisable after reportedly shedding a whopping 19 kilograms.

Posing with a demure pout in one photo, while playfully poking her tongue out in another, the 31-year-old, who split from husband Simon Konecki in April this year, looked sensational in a satin black gown with her strawberry blonde hair curled to one side.

A source close to the Oscar-winning singer revealed she was motivated to give her health an overhaul for the sake of her seven-year-old son, Angelo, and adopted a new fitness regimen earlier this year.

"At first, she was very hesitant about keeping a workout routine. It was like she was questioning if she was gonna enjoy it enough to stick with it," the insider said.

Adele's routine now includes regular sessions with a personal trainer, reformer pilates classes, and workouts at the Hollywood-loving Rise Nation, a Stairmaster-inspired class.

Another source added that she's also "watching what she eats".

"She has taken a more serious interest in improving herself and is actually having a great time," the friend revealed.

We think she looks incredible!