Nicola Coughlan plays as Clare Devlin in Bridgerton.
Nicola Coughlan is the top #1 member of the cast and appears in 12 episodes.

Polly Walker (born 19 May 1966) is an English actress. Description above from the Wikipedia article Polly Walker, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Polly Walker plays as Gill Biggeloe in Bridgerton.
Polly Walker is the top #2 member of the cast and appears in 12 episodes.

Harriet Cains is an actress, known for Bridgerton (2020), Mercury (2018) and Line of Duty (2012).

Harriet Cains plays as Gail in Bridgerton.
Harriet Cains is the top #3 member of the cast and appears in 8 episodes.

Regé-Jean Page is a British actor. Raised in Zimbabwe, schooled in the UK, and working extensively in the USA, Regé is known for a keen international perspective and versatility that characterizes his work.

Regé-Jean Page plays as Simon Basset in Bridgerton.
Regé-Jean Page is the top #4 member of the cast and appears in 8 episodes.

Phoebe Harriet Dynevor is an English actress, the daughter of Coronation Street actress, Sally Dynevor. She began her career starring in the BBC One school-based drama series, Waterloo Road as Siobhan Mailey, and later appeared in Prisoners' Wives and Dickensian.

Phoebe Dynevor plays as Daphne Bridgerton in Bridgerton.
Phoebe Dynevor is the top #5 member of the cast and appears in 8 episodes.

Dame Julia Elizabeth Andrews, DBE is a British film and stage actress, singer, and author. She is the recipient of Golden Globe, Emmy, Grammy, BAFTA, People's Choice Award, Theatre World Award, Screen Actors Guild and Academy Award honours. Andrews was a former British child actress and singer who made her Broadway debut in 1954 with The Boy Friend, and rose to prominence starring in other musicals such as My Fair Lady and Camelot, and in musical films such as Mary Poppins (1964), for which she won the Academy Award for Best Actress, and The Sound of Music (1965): the roles for which she is still best-known. Her voice, which originally spanned four octaves, was damaged by a throat operation in 1997. Andrews had a revival of her film career in 2000s in family films such as The Princess Diaries (2001), its sequel The Princess Diaries 2: Royal Engagement (2004), the Shrek animated films (2004–2010), and Despicable Me (2010). In 2003 Andrews revisited her first Broadway success, this time as a stage director, with a revival of The Boy Friend at the Bay Street Theatre, Sag Harbor, New York (and later at the Goodspeed Opera House, in East Haddam, Connecticut in 2005). Andrews is also an author of children's books, and in 2008 published an autobiography, Home: A Memoir of My Early Years.

Julie Andrews plays as Lady Whistledown (voice) in Bridgerton.
Julie Andrews is the top #6 member of the cast and appears in 8 episodes.

Jonathan Bailey (born 25 April 1988) is a British actor, best known for the ITV drama Broadchurch, the BBC's Doctor Who, W1A and Leonardo, and Channel 4 comedy Campus. He won the Laurence Olivier Award for Best Actor in a Supporting Role in a Musical for his portrayal of Jamie in the 2018 West End revival of Company.

Jonathan Bailey plays as Anthony Bridgerton in Bridgerton.
Jonathan Bailey is the top #7 member of the cast and appears in 8 episodes.

Luke Newton is an English actor, known for his roles as Luke Attwood on the BBC drama 'The Cut' and Ben Evans on the Disney Channel series 'The Lodge'. In 2020, Newton is set to begin portraying the role of Colin Bridgerton on the Netflix's series 'Bridgerton'.

Luke Newton plays as Colin Bridgerton in Bridgerton.
Luke Newton is the top #8 member of the cast and appears in 8 episodes.

Ruth Gemmell is an English actress, known for her role in the 1997 film Fever Pitch. She is also known for her work on the television show Utopia as Jen Dugdale.

Ruth Gemmell plays as Violet Bridgerton in Bridgerton.
Ruth Gemmell is the top #9 member of the cast and appears in 8 episodes.

Golda Rosheuvel is an actress, known for Lady Macbeth (2016), Luther (2010) and Silent Witness (1996).

Golda Rosheuvel plays as Queen Charlotte in Bridgerton.
Golda Rosheuvel is the top #10 member of the cast and appears in 8 episodes.