Colin Farrell is an Irish actor and Golden Globe Winner from 2009, who plays David. He was also nominated for the Golden Globe´s award for Best Performance by an Actor in a Motion Picture for the movie The Lobster.

Rachel Weisz plays Short Sighted Woman with whom David starts the relationship. Weisz, BAFTA´s British Artist of the Year from 2006, is well known for her roles in Agora, The Mummy, and The Lovely Bones.

Léa Seydoux, best known as Dr. Madeleine Swann from Spectre is a French actress who plays Loner Leader in The Lobster.

Ben Whishaw or Q from recent Bond movies portrays The Limping Man. Apart from being a member of The Lobster cast, he is also known for his roles in Perfume: Story of a Murderer and Cloud Atlas.

Olivia Coleman is an English actress who plays the Hotel Manager. She is the winner of three BAFTA awards, as well three British Independent Film Awards, and one Golden Globe Award.

John C. Riley is an American comedian, actor, screenwriter, producer and singer who plays Lisping Man. He is the Academy Awards Nominee, best known for his roles in Chicago, The Hours, The Aviator and Step Brothers.

Jesica Barden is a British actress who plays Nosebleed Woman. She is also known for her roles in Hanna and Far from the Madding Crowd.

Ariane Labed is a Greek-born French actress known for her roles in movies such as Before Midnight and Alps. In The Lobster she plays the Maid.

Ashley Jensen is a Scottish actress who plays Biscuit Woman. She was best known for her role in television series Extras for which she was nominated for Emmy.

Angeliki Papoulia is another member of the Lobster cast. This Greek actress and founding member of the theatre group called Blitz, plays Hearthless Woman.

Michael Smiley is the actor from Northern Ireland who plays Loner Swimmer. He also played in Perfume: Story of a Murderer, Kill List, and The World´s End.

Roger Ashton-Griffiths is a British/Canadian theatre and movie actor who is lately famous as part of the Game of Thrones cast. He is also known for his theatre roles in King Lear and Sweeny Todd. He plays the Doctor.

Rosanna Hoult plays David´s wife. She is a less known actress among The Lobster cast who does not have many titles in her filmography. However, some of the titles include Kill Your Friends and Captain America: The First Avenger.

Ewen MacIntos, or Keith Bishop from The Office, plays Trainer Waiter. He is an English actor, comedian, and writer.