Franklin Shea Whigham Jr. (born January 5, 1969) is an American actor. He portrayed Elias "Eli" Thompson in the HBO drama series Boardwalk Empire, and had notable supporting roles in films Kong: Skull Island, Death Note, Take Shelter, and the first season of True Detective, the third season of Fargo, and Joker. He appeared as Agent Michael Stasiak in Fast & Furious and Fast & Furious 6. In 2020 he was cast as Pete Strickland on HBO's reimagining of Perry Mason, a role for which he received attention for his moustache. Description above from the Wikipedia article Shea Whigham, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Shea Whigham plays as Pete Strickland in Gaslit.
Shea Whigham is the top #1 member of the cast and appears in 8 episodes.

Julia Fiona Roberts (born October 28, 1967) is an American actress and producer. She established herself as a leading lady in Hollywood after headlining the romantic comedy film Pretty Woman (1990), which grossed $464 million worldwide. She has won three Golden Globe Awards, from eight nominations, and has been nominated for four Academy Awards for her film acting, winning the Academy Award for Best Actress for her performance in Erin Brockovich (2000). Her films have collectively brought box office receipts of over US$2.8 billion, making her one of the most bankable actresses in Hollywood. Her most successful films include Mystic Pizza (1988), Steel Magnolias (1989), Pretty Woman (1990), Sleeping with the Enemy (1991), The Pelican Brief (1993), My Best Friend's Wedding (1997), Notting Hill (1999), Runaway Bride (1999), Erin Brockovich (2000), Ocean's Eleven (2001), Ocean's Twelve (2004), Charlie Wilson's War (2007), Valentine's Day (2010), Eat Pray Love (2010), Money Monster (2016), and Wonder (2017). Roberts was nominated for the Primetime Emmy Award for Outstanding Supporting Actress in a Limited Series or Movie for her performance in the HBO television film The Normal Heart (2014). In 2018, she starred in the Prime Video psychological thriller series Homecoming. Roberts was the highest-paid actress in the world throughout most of the 1990s and in the first half of the 2000s. Her fee for 1990's Pretty Woman was US$300,000; in 2003, she was paid an unprecedented $25 million for her role in Mona Lisa Smile (2003). As of 2017, Roberts's net worth was estimated to be $170 million. People magazine has named her the most beautiful woman in the world a record five times. Description above from the Wikipedia article Julia Roberts licensed under CC-BY-SA, full list of contributors on Wikipedia.

Julia Roberts plays as Martha Mitchell in Gaslit.
Julia Roberts is the top #2 member of the cast and appears in 4 episodes.

An American actor, screenwriter and film director, also known for his political and social activism. He is a two-time Academy Award winner for his roles in Mystic River (2003) and Milk (2008), as well as the recipient of a Golden Globe Award for the former and a Screen Actors Guild Award for the latter. Penn began his acting career in television with a brief appearance in a 1974 episode of Little House on the Prairie, directed by his father Leo Penn. Following his film debut in 1981's Taps and a diverse range of film roles in the 1980s, Penn emerged as a prominent leading actor with the 1995 drama film Dead Man Walking, for which he earned his first Academy Award nomination and the Best Actor Award at the Berlin Film Festival. Penn subsequently received another two Oscar nominations for Sweet and Lowdown (1999) and I Am Sam (2001), before winning his first Academy Award for Best Actor in 2003 for Mystic River and a second one in 2008 for Milk. He has also won a Best Actor Award of the Cannes Film Festival for She's So Lovely (1997), and two Best Actor Awards at the Venice Film Festival for Hurlyburly (1998) and 21 Grams (2003). Penn made his feature film directorial debut with 1991's The Indian Runner, followed by the drama film The Crossing Guard (1995) and the mystery film The Pledge (2001). In 2002, Penn directed one of the 11 segments of 11'09"01 September 11, a compilation film made in response to the September 11 attacks. In 2007, Penn directed his fourth feature film Into the Wild, which garnered critical acclaim and two Academy Award nominations. In addition to his film work, Penn is known for his political and social activism, most notably his criticism of the George W. Bush administration, his contact with the Presidents of Venezuela and Cuba, and his humanitarian work in the aftermath of Hurricane Katrina and the 2010 Haiti earthquake. Penn also attracted media attention for his previous marriages to pop icon Madonna and actress Robin Wright. Description above from the Wikipedia article Sean Penn, licensed under CC-BY-SA, full list of contributors on Wikipedia

Sean Penn plays as John Mitchell in Gaslit.
Sean Penn is the top #3 member of the cast and appears in 4 episodes.

Daniel Jonathan Stevens (born 10 October 1982) is an English actor. He first drew international attention for his role as Matthew Crawley in the ITV acclaimed period drama series Downton Abbey (2010–12). He also starred as David in the thriller film The Guest (2014), Sir Lancelot in the adventure film Night at the Museum: Secret of the Tomb (2014), The Beast/Prince in Disney's live action adaptation of Beauty and the Beast (2017), Lorin Willis in the biographical legal drama Marshall (2017), Charles Dickens in the biographical drama The Man Who Invented Christmas (2017) and Russian Eurovision singer Alexander Lemtov in Eurovision Song Contest: The Story of Fire Saga (2020). From 2017 to 2019, he starred as David Haller in the critically acclaimed FX series Legion. In 2018, he starred in the Netflix horror-thriller Apostle.

Dan Stevens plays as John Dean in Gaslit.
Dan Stevens is the top #4 member of the cast and appears in 4 episodes.

Elizabeth Gilpin (born July 21, 1986) is an American actress, best known for portraying Debbie "Liberty Belle" Eagan in Netflix's comedy series GLOW. She also starred as Dr. Carrie Roman in the Showtime comedy-drama series Nurse Jackie. Gilpin also starred in films such as True Story (2015), Future '38 (2017), Isn't It Romantic (2019), A Dog's Journey (2019), Stuber (2019), The Grudge (2020) and The Hunt (2020).

Betty Gilpin plays as Elizabeth Abbott, Sister Simone in Gaslit.
Betty Gilpin is the top #5 member of the cast and appears in 4 episodes.

Darby Eliza Camp is an American actress, known for her roles in the Netflix holiday film The Christmas Chronicles and the HBO television series Big Little Lies.

Darby Camp plays as Marty Mitchell in Gaslit.
Darby Camp is the top #6 member of the cast and appears in 4 episodes.