Yerin Ha as Sophie Baek - She enters the Bridgerton world as a maid working under Lady Araminta Gun and her daughters, Rosamund and Posy. Much like the classic fairy tale, Sophie is treated poorly and forced into endless labor.

Luke Thompson as Benedict Bridgerton - The second-eldest Bridgerton brother who is now taking center stage as Season 4’s leading man. While he’s been reluctant to settle down in the past, it’s love at first sight when he spots Sophie.

Katie Leung as Lady Araminta Gun - Katie Leung steps into the role of Lady Araminta Gun, a widow twice over who dresses exclusively in black. Araminta’s pursuit of power and prestige makes the Bridgertons her prime target.

Michelle Mao as Rosamund Li - She is Araminta’s eldest daughter and the apple of her mother’s eye. Outwardly beautiful but inwardly vain and self-centered.

Isabella Wei as Posy Li -  Unlike her sister, Posy is sweet-natured but often dismissed as foolish. Her tendency to chatter endlessly makes her the subject of ridicule from both her mother and Rosamund.

Jonathan Bailey as Anthony Bridgerton - He is the eldest of the Bridgerton siblings and as such, became a parental figure towards his younger brother and sisters after the death of their father.

Simone Ashley as Kate Bridgerton - She plays the wife of Anthony Bridgerton, and their happily married life is showed in past seasons. She is direct, principled, and unafraid to challenge authority — qualities that repeatedly place her at odds with Anthony Bridgerton, the viscount she initially distrusts.

Luke Newton as Colin Bridgerton - The third eldest Bridgerton sibling, known for his charm, wit, and love of travel. He matured in season three and married his longtime friend, Penelope Featherington.

Claudia Jessie as Eloise Bridgerton - Eloise is the spirited and clever fifth Bridgerton sibling. She challenges the 19th-century marriage market in pursuit of her own independence.

Ruth Gemmell as Violet Bridgerton - She is the Dowager Viscountess Bridgerton, widow of Edmund Bridgerton, and mother to the eight Bridgerton children.

Will Tilston as Gregory Bridgerton - The second youngest child overall, Gregory is often seen causing mischief with his sister Hyacinth and interacting with his older siblings.

Florence Hunt as Hyacinth Bridgerton - Already showing a maturity and poise that rivals her older siblings, she continues to steal scenes with her wit and adventurous spirit.

Golda Rosheuvel as Queen Charlotte - She dictates high society, using her influence to make or break reputations, most notably in her quest to identify Lady Whistledown.

Adjoa Andoh as Lady Danbury -  She is a close advisor and trusted friend of Queen Charlotte often guiding her on matters of court and society.