Michael Stewart Stuhlbarg (born July 5, 1968) is an American actor. He rose to prominence as troubled university professor Larry Gopnik in the 2009 dark comedy film A Serious Man, directed by Joel and Ethan Coen. Stuhlbarg has appeared in numerous films and television series portraying real life figures, such as George Yeaman in Lincoln (2012), Lew Wasserman in Hitchcock (2012), Andy Hertzfeld in Steve Jobs (2015), Edward G. Robinson in Trumbo (2015), Abe Rosenthal in The Post (2017), Stanley Edgar Hyman in Shirley (2020), Arnold Rothstein in HBO's Boardwalk Empire (2010–2013), Richard A. Clarke in The Looming Tower (2018), and as Richard Sackler in Dopesick (2021). His performance in The Looming Tower earned him a Primetime Emmy Award nomination for Outstanding Supporting Actor in a Limited Series or Movie. Stuhlbarg's other notable supporting roles include Hugo (2011), Men in Black 3 (2012), Blue Jasmine (2013), Pawn Sacrifice (2014), Arrival (2016), and Doctor Strange (2016), the third season of the anthology television series Fargo (2017), as well as on the Showtime series Your Honor (2020-present). In 2017, Stuhlbarg appeared in the films Call Me by Your Name, The Shape of Water, and The Post, all three of which were nominated for the Academy Award for Best Picture. For Call Me By Your Name, Stuhlbarg received multiple film critics' award nominations in the supporting actor category. On stage, Stuhlbarg has acted in numerous productions including the 2005 debut of The Pillowman on Broadway, for which he won a Drama Desk Award and received a Tony Award nomination.

Michael Stuhlbarg plays as Jimmy Baxter in The Staircase.
Michael Stuhlbarg is the top #1 member of the cast and appears in 13 episodes.

Dane William DeHaan (born February 6, 1986) is an American actor, known for his roles as Andrew Detmer in Chronicle (2012), Harry Osborn/Green Goblin in The Amazing Spider-Man 2 (2014), Lockhart in A Cure for Wellness (2016), Valerian in Valerian and the City of a Thousand Planets (2017), and Chris Lynwood in ZeroZeroZero. In 2021, he starred in psychological romance horror miniseries Lisey's Story.

Dane DeHaan plays as Jim Dooley in The Staircase.
Dane DeHaan is the top #2 member of the cast and appears in 8 episodes.

Toni Collette Galafassi (born Toni Collett; 1 November 1972) is an Australian actress, producer, singer, and songwriter. Known for her work in television and independent films, she has received various accolades throughout her career, including a Golden Globe Award and a Primetime Emmy Award, in addition to nominations for an Academy Award, a Tony Award, and two British Academy Film Awards. After making her film debut in Spotswood (1992) and being nominated for the AACTA Award for Best Actress in a Supporting Role, her breakthrough role came in the comedy-drama Muriel's Wedding (1994), which earned her a Golden Globe Award nomination and won her the AACTA Award for Best Actress in a Leading Role. Collette achieved greater international recognition for her role in the psychological thriller film The Sixth Sense (1999), and was nominated for the Academy Award for Best Supporting Actress. She received BAFTA Award nominations for her performances in the romantic comedy About a Boy (2002) and the comedy-drama Little Miss Sunshine (2006). Collette's films include diverse genres, such as the period comedy Emma (1996), the action thriller Shaft (2000), the period drama The Hours (2002), the romantic drama Japanese Story (2003), the comedies In Her Shoes (2005) and The Way, Way Back (2013), the horror films Krampus (2015) and Hereditary (2018), and the mystery film Knives Out (2019). Her Broadway performances include the lead role in The Wild Party (2000), which earned her a Tony Award nomination. In television, she starred in the Showtime comedy-drama series United States of Tara (2008–2011) and the Netflix drama miniseries Unbelievable (2019). For the former, she won a Primetime Emmy Award and a Golden Globe Award. She has won five AACTA Awards, from eight nominations. Collette married Dave Galafassi, drummer of the band Gelbison, in January 2003. The couple have two children together. As the lead singer of Toni Collette & the Finish, she wrote all 11 tracks of their sole album, Beautiful Awkward Pictures (2006). The band toured Australia, but have not performed nor released any new material after 2007. In 2017, Collette and Jen Turner co-founded the film production company Vocab Films.

Toni Collette plays as Laura Oliver in The Staircase.
Toni Collette is the top #3 member of the cast and appears in 8 episodes.

Odessa Young (born 11 January 1998) is an Australian actress. She is known for her roles in the 2015 feature films Looking for Grace and The Daughter, the latter of which earned her an AACTA Award for Best Actress in a Leading Role. She won further accolades for her performance in the web series High Life in 2017. In 2018, she starred in the films Assassination Nation and A Million Little Pieces. That year, she also made her off-Broadway debut in Days of Rage. In 2020, she starred as Frannie in the post-apocalypse miniseries The Stand, based on the 1978 novel of the same name by Stephen King, and opposite Elisabeth Moss in Shirley (2020), a film about the novelist Shirley Jackson. Description above is from the Wikipedia article Odessa Young, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Odessa Young plays as Martha Ratliff in The Staircase.
Odessa Young is the top #4 member of the cast and appears in 4 episodes.

Tim Guinee (born November 18, 1962) is an American stage, television, and film actor.

Tim Guinee plays as Bill Peterson in The Staircase.
Tim Guinee is the top #5 member of the cast and appears in 4 episodes.

Sophie Belinda Jonas[1] (née Turner; born 21 February 1996) is an English actress. She made her acting debut as Sansa Stark on the HBO epic fantasy television series Game of Thrones (2011–2019), for which she received a Primetime Emmy Award nomination for the Outstanding Supporting Actress in a Drama Series in 2019. Turner appeared in the television film The Thirteenth Tale (2013) and made her feature film debut in Another Me (2013). She appeared in the action comedy Barely Lethal (2015) and portrayed a young Jean Grey / Phoenix in the X-Men film series (2016–2019).

Sophie Turner plays as Margaret Ratliff in The Staircase.
Sophie Turner is the top #6 member of the cast and appears in 4 episodes.

Colin Andrew Firth (born 10 September 1960) is an English film, television, and stage actor. Firth gained wide public attention in the 1990s for his portrayal of Mr. Darcy in the 1995 television adaptation of Jane Austen's Pride and Prejudice. In 2011, Firth received the Academy Award for Best Actor for his portrayal of King George VI in The King's Speech, a performance that also earned him the Golden Globe, BAFTA, and Screen Actors Guild Award for Best Actor. The previous year he received his first Academy Award nomination for his leading role in A Single Man, a performance that won him a BAFTA Award. Firth's other major film credits include The English Patient, Shakespeare in Love, Bridget Jones's Diary, Mamma Mia! and Love Actually. He received a star on the Hollywood Walk of Fame in 2011.

Colin Firth plays as Michael Peterson in The Staircase.
Colin Firth is the top #7 member of the cast and appears in 4 episodes.

Olivia DeJonge was born to Robyn and Rob DeJonge on April 30, 1998, in Melbourne, and is the oldest out of two children. In October 2003 she and her family moved to Perth Western Australia where she commenced school at Presbyterian Ladies College in Peppermint Grove, a riverside suburb of Perth. Olivia's first acting opportunity came when she was 8 years old, in the form of a radio voiceover for a prominent hardware chain. Since then she has become a sought after young voiceover specialist who has completed well over 40 radio advertisements. In 2010 Olivia was offered the lead role in Maziar Lahooti's short film the Good Pretender (2011), and Olivia won the 24th Western Australian Screen Awards Best Actress Award for her performance.

Olivia DeJonge plays as Caitlin Atwater in The Staircase.
Olivia DeJonge is the top #8 member of the cast and appears in 4 episodes.

Patrick Arnold Shriver Schwarzenegger (born September 18, 1993) is an American model and actor. He is the son of Austrian-American bodybuilder, actor, and former Governor of California, Arnold Schwarzenegger, and journalist and author, Maria Shriver.

Patrick Schwarzenegger plays as Todd Peterson in The Staircase.
Patrick Schwarzenegger is the top #9 member of the cast and appears in 4 episodes.

Juliette Binoche (born 9 March 1964) is a French actress, artist and dancer. She has appeared in more than 40 feature films, been recipient of numerous international accolades, is a published author and has appeared on stage across the world. Coming from an artistic background, she began taking acting lessons during adolescence. After performing in several stage productions, she was propelled into the world of auteurs Jean-Luc Godard (Hail Mary, 1985), Jacques Doillon (Family Life, 1985) and André Téchiné, who made her a star in France with the leading role in his 1985 drama Rendez-vous. Her sensual performance in her English-language debut The Unbearable Lightness of Being (1988), directed by Philip Kaufman, launched her international career. She sparked the interest of Steven Spielberg, who offered her several parts including a role in Jurassic Park which she declined, choosing instead to join Krzysztof Kieslowski on the set of Three Colors: Blue (1993), a performance for which she won the Venice Film Festival Award for Best Actress and a César. Three years later Binoche gained further acclaim in Anthony Minghella’s The English Patient (1996), for which she was awarded an Academy Award and a BAFTA for Best Supporting Actress in addition to the Best Actress Award at the 1997 Berlin Film Festival. For her performance in Lasse Hallström’s romantic comedy Chocolat (2000) Binoche was nominated for an Academy Award for Best Actress. During the 2000s she maintained a successful, critically acclaimed career, alternating between French and English language roles in both mainstream and art-house productions. In 2010 she won the Best Actress Award at the Cannes Film Festival for her role in Abbas Kiarostami’s Certified Copy making her the first actress to win the European “best actress triple crown”. Throughout her career Binoche has intermittently appeared on stage, most notably in a 1998 London production of Luigi Pirandello’s Naked and in a 2000 production of Harold Pinter's Betrayal on Broadway for which she was nominated for a Tony Award. In 2008 she began a world tour with a modern dance production in-i devised in collaboration with Akram Khan. Affectionately referred to as "La Binoche" by the French press, her other notable performances include: Mauvais Sang (1986), Les Amants du Pont-Neuf, Damage (1992), The Horseman on the Roof (1995), Code Unknown (2000), Caché (2005), Breaking and Entering (2006) and Flight of the Red Balloon (2007). Description above from the Wikipedia article Juliette Binoche, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Juliette Binoche plays as Sophie Brunet in The Staircase.
Juliette Binoche is the top #10 member of the cast and appears in 4 episodes.