David Oyelowo (born April 1, 1976) is an English actor, director and producer. His family originates from Nigeria. David studied Theatre Studies for A level and his teacher suggested he should become an actor. After A levels David enrolled for a year on an Art foundation course. In December 2000 David became the first black actor to play an English monarch for the RSC taking the title role in Henry VI. His performance won him the 'Ian Charleson' Award 2001 for best newcomer in a classical play.

David Oyelowo plays as Bass Reeves in Silo.
David Oyelowo is the top #1 member of the cast and appears in 4 episodes.

Lonnie Rashid Lynn (born March 13, 1972), known by his stage name Common (formerly Common Sense), is an American rapper and actor. He debuted in 1992 with the album Can I Borrow a Dollar?, and gained critical acclaim with his 1994 album Resurrection. He maintained an underground following into the late 1990s. He achieved mainstream success through his work with the Soulquarians. Common's first major-label album Like Water for Chocolate (2000), received commercial success. In 2003, he won the Grammy Award for Best R&B Song for the Erykah Badu single "Love of My Life". His 2005 album Be was also a commercial success and was nominated for Best Rap Album at the 2006 Grammy Awards. Common received his second Grammy Award for Best Rap Performance by a Duo or Group for "Southside" (featuring Kanye West), from his 2007 album Finding Forever. His best-of album, Thisisme Then: The Best of Common, was released in late 2007. In 2011, Common launched Think Common Entertainment, his own record label imprint, having previously released music under various other labels including Relativity, Geffen, and GOOD Music. Common won the 2015 Golden Globe Award for Best Original Song and the Academy Award for Best Original Song, for his song, co-written and performed with John Legend, "Glory" from the 2014 film Selma, in which he co-starred as Civil Rights Movement leader James Bevel. Common's acting career also includes roles in the films Smokin' Aces, Street Kings, American Gangster, Wanted, Terminator Salvation, Date Night, Just Wright, Happy Feet Two, New Year's Eve, Run All Night, Being Charlie, Rex, John Wick: Chapter 2, Smallfoot and Hunter Killer. He also narrated the documentary Bouncing Cats, about one man's efforts to improve the lives of children in Uganda through hip-hop/b-boy culture. He starred as Elam Ferguson on the AMC western television series Hell on Wheels. Description above from the Wikipedia article Common (rapper), licensed under CC-BY-SA, full list of contributors on Wikipedia.

Common plays as Robert Sims in Silo.
Common is the top #2 member of the cast and appears in 2 episodes.

Rebecca Louisa Ferguson Sundström (born 19 October 1983) is a Swedish actress. She began her acting career with the Swedish soap opera Nya tider (1999–2000) and went on to star in the slasher film Drowning Ghost (2004). She came to international prominence with her portrayal of Elizabeth Woodville in the British television miniseries The White Queen (2013), for which she was nominated for a Golden Globe for Best Actress in a Miniseries or Television Film. Ferguson starred as MI6 agent Ilsa Faust in the action spy film Mission: Impossible – Rogue Nation (2015) and its sequel Mission: Impossible – Fallout (2018). She also played Jenny Lind in the musical film The Greatest Showman (2017) and acted in science fiction horror film Life (2017), starred in the horror film Doctor Sleep (2019), and had supporting parts in the comedy-drama Florence Foster Jenkins (2016), the mystery thriller The Girl on the Train (2016), and the science fiction film Men in Black: International (2019). She portrayed Lady Jessica in the sci-fi epic Dune (2021).

Rebecca Ferguson plays as Juliette Nichols in Silo.
Rebecca Ferguson is the top #3 member of the cast and appears in 2 episodes.

Dame Harriet Mary Walter DBE (born 24 September 1950) is a British actress. She has received a Laurence Olivier Award as well as numerous nominations including for a Tony Award, three Primetime Emmy Awards, and a Screen Actors Guild Award. In 2011, she was appointed Dame Commander of the Order of the British Empire (DBE) for services to drama. Walter began her career in 1974 and made her Broadway debut in 1983. For her work in various Royal Shakespeare Company productions, including Twelfth Night (1987–88) and Three Sisters (1988), she won the 1988 Olivier Award for Best Actress in a Revival. Her other notable work for the RSC includes leading roles in Macbeth (1999) and Antony and Cleopatra (2006). She won the Evening Standard Award for Best Actress for her role as Elizabeth I in the 2005 London revival of Mary Stuart, and received a Tony Award nomination for Best Actress in a Play when she reprised the role on Broadway in 2009. She reprised her roles of Brutus in Julius Caesar (2012) and the title role in Henry IV (2014), as well as playing Prospero in The Tempest, as part of an all-female Shakespeare trilogy in 2016. Her film appearances include Sense and Sensibility (1995), The Governess (1998), Villa des Roses (2002), Atonement (2007), The Young Victoria (2009), A Royal Affair (2012), Star Wars: The Force Awakens (2015), Denial (2016), The Sense of an Ending (2017), Rocketman (2019) and Ridley Scott's The Last Duel (2021). On television she starred as Natalie Chandler in the ITV drama series Law & Order: UK (2009–14), in four episodes of Downton Abbey (2013–15), in the miniseries London Spy (2015), as Clementine Churchill in The Crown (2016), in Patrick Melrose (2018), and in the third season of Killing Eve (2020). She is a three-time Primetime Emmy Award nominee; two for Outstanding Guest Actress in a Drama Series for Succession (2018–21) and one for Outstanding Guest Actress in a Comedy Series for Ted Lasso (2021). Description above from the Wikipedia article Harriet Walter, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Harriet Walter plays as Martha Walker in Silo.
Harriet Walter is the top #4 member of the cast and appears in 2 episodes.

Timothy Francis Robbins (born October 16, 1958) is an American actor, screenwriter, director, producer, and musician. He is best known for his portrayal of Andy Dufresne in the prison drama film The Shawshank Redemption (1994).

Tim Robbins plays as Bernard Holland in Silo.
Tim Robbins is the top #5 member of the cast and appears in 2 episodes.