Ben Whishaw
Ben Whishaw is an English actor known for his roles in the movies "Perfume: The Story of a Murderer" and "Mary Poppins Returns". In "Bright Star" he portrays the famous English poet from the Romanticism period. John Keats doesn't have much luck as a poet, his work being undermined and compared to Wordsworth and Lord Byron. He dies before he gets to enjoy success and marry the love of his life, Fanny Brawne.
Abbie Cornish
Abbie Cornish is an Australian actress known for her roles in "Sucker Punch" and "Limitless". In "Bright Star" she portrays Fanny Brawne, a passionate and outspoken love of John Keats. The poem that is alluded to in the title is dedicated to her.
Paul Schneider
Paul Schneider is an award-winning American actor best known for his role in the show "Parks and Recreation". In "Bright Star" he portrays Charles Brown, Keats's best friend and a partner in poetry-writing. Charles is also against Keats's and Brawne's love because he believes it harms John's writing.
Thomas Sangster
Thomas Sangster is an English actor known for his roles in "Maze Runner" and "The Queen's Gambit". In "Bright Star" he has a role of Fanny's younger brother Samuel, who is learning to play the violin and follows Fanny around together with their youngest sister.