Kether Donohue is an American actress and singer. She is known for her role as Lindsay on You're the Worst and her role as a cappella leader Alice in Pitch Perfect.

Kether Donohue plays as Gillian (voice) in B Positive.
Kether Donohue is the top #1 member of the cast and appears in 12 episodes.

Annaleigh Amanda Ashford (born June 25, 1985) is an American actress, singer, and dancer. She is known for her work on Broadway as Glinda in Wicked (2005–2006; 2007–08), and Margot in Legally Blonde (2007), as well as for originating the role of Lauren in Kinky Boots (2013–14), a performance for which she received a 2013 Tony nomination. Ashford won the 2015 Tony Award for Best Featured Actress in a Play for her performance as Essie Carmichael in the revival of You Can't Take It with You (2014–15). In 2017, she starred as Dot/Marie in the critically acclaimed, limited-run revival of Sunday in the Park with George. Additionally, she is known for portraying the role of Betty DiMello on the period drama television series Masters of Sex, which ran for four seasons on Showtime. In 2019, she starred as Jenny Aquila in Bad Education, and, in 2020, as Paula Jones in Impeachment: American Crime Story. Description above is from the Wikipedia article Annaleigh Ashford, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Annaleigh Ashford plays as Paula Jones in B Positive.
Annaleigh Ashford is the top #2 member of the cast and appears in 10 episodes.

Terrence Terrell plays as Trunk in B Positive.
Terrence Terrell is the top #3 member of the cast and appears in 8 episodes.

Thomas Steven Middleditch is a Canadian actor, comedian, and television writer, known for his role as Richard Hendricks in the HBO series Silicon Valley, for which he was nominated for a Primetime Emmy Award for Outstanding Lead Actor in a Comedy Series. Wikipedia

Thomas Middleditch plays as Drew in B Positive.
Thomas Middleditch is the top #4 member of the cast and appears in 6 episodes.

Sara Rue (born January 26, 1979) is an American television actress. She is best known for her roles on Popular and Less Than Perfect. She hosted Shedding for the Wedding and had a recurring role on Rules of Engagement.

Sara Rue plays as Julia in B Positive.
Sara Rue is the top #5 member of the cast and appears in 6 episodes.

Maggie Elizabeth Jones (born October 10, 2003) is an American child actor, best known for her roles in We Bought a Zoo and the sitcom Ben and Kate.

Maggie Elizabeth Jones plays as Maddie in B Positive.
Maggie Elizabeth Jones is the top #6 member of the cast and appears in 6 episodes.

Izzy G. plays as Maddie in B Positive.
Izzy G. is the top #7 member of the cast and appears in 6 episodes.