Millie O’Connell first captivated audiences with her acclaimed portrayal of Anne Boleyn in the original UK tour and West End production of SIX: The Musical, beginning in 2018. Her performance garnered critical acclaim, leading to an Olivier Award nomination for Best Actress in a Supporting Role in a Musical in 2019. An integral part of the original West End cast, O’Connell performed in the show until October 2019, notably completing the most performances among the original cast members. Prior to this breakthrough, O’Connell made her professional stage debut in 2016 in the international revival of 42nd Street at the Théâtre du Châtelet in Paris, where she was part of the ensemble and understudied Peggy Sawyer.
In 2022, she reprised her iconic role as Anne Boleyn for SIX: Live at Hampton Court Palace. Making her feature film debut, O’Connell appeared as Tram Lady 2 in the Oscar-winning film Wonka in 2023. That same year, she brought to life the role of Sleeping Beauty in Sleeping Beauty: The Fairy’s Tale. O’Connell’s screen presence continues to grow, with an upcoming voice role as Sally Sunshine in the highly anticipated Doctor Who series in 2025.
Demonstrating her ongoing commitment to major theatrical productions, she is set to perform as Cookie in Come Fall In Love – The DDLJ Musical, also in 2025. Her consistent string of high-profile roles in both theatre and screen underscores her position as a versatile and sought-after talent in the entertainment industry.