The gorgeous actress, who plays Jessa Johansson in HBO's hit series Girls, chose to have her tresses dyed into a colourful ombre style, opting for a bubblegum shade of pink.
Jemima Kirke showed off her new pink locks on Monday
To show off her new look, Jemima had her famously long locks styled into loose curls, contrasting her usually straight hair.
The mother-of-two complemented her new look in a black maxi dress with a floral pattern, and finished off her outfit with some black and pink shoes. She kept her makeup simple, save for a bold coral lip.
When it comes to drastic hair transformations, Jemima is not the first of the Girls cast to have undergone a makeover this year.
Jemima's Girls co-stars Lena Dunham and Zosia Mamet have also undergone drastic hair transformations
In August, Lena Dunham, who plays Hannah, revealed that she had cut her hair into a dramatic platinum blonde bob in a video of herself taking part in the ALS Ice Bucket Challenge.
Co-star Zosia Mamet also unveiled a new bright blonde bob hairstyle when she appeared at New York Fashion Week a few weeks later.
Jemima, 29, looked stunning with her pink locks, following in the footsteps of Dame Helen Mirren who made waves at the 2013 BAFTAS when she stepped out sporting a pale pink hairdo, and Lauren Conrad who was also spotted with a pink dip dye hairstyle last year.