The cast brings the real peopleand their real storiesto life on screen. Here's what you need to know about both the actors and lead characters in Unbelievable.

Marie Adler is played by Booksmart's Kaitlyn Dever.

Kaitlyn Dever portrays 18-year-old Marie, one of the main sexual assault victims. Although her full name is not public, it's known that Marie was the real woman's middle name, and court documents identified the 18-year-old raped by Marc OLeary , as D.M., per the Denver Post . She told police she was threatened with a knife, tied up, blindfolded, and raped in her apartment. She was subjected to multiple interrogations, and later recounted her sexual assault accusation. It took years before detectives brought her attacker to justice.

You'll recognize Kaitlyn as Amy in Booksmart. The actress also grew up playing Eve on Last Man Standing.

Elizabeth Marvel is Judith, Marie's foster mother.

Judith, played by Elizabeth Marvel, is one of Maries foster mothers in Unbelievable. The real Marie lived with many foster families before turning 18 and was, indeed, close to two of her foster mothers. Unfortunately, Judith begins to doubt Marie's story in the Netflix series.

Elizabeth had roles in True Grit and Lincoln. She also played President Elizabeth Keane for two years in Homeland, per IMDB .

Toni Collette plays Detective Grace Rasmussen.

Toni Collette takes on the role of Detective Grace Rasmussen, whose character is based on Westminster Detective Edna Hendershot. In real life, Hendershot teamed up with Galbraith to solve the cases.

The Australian actress appeared in Hereditary, Little Miss Sunshine, and The Sixth Sense.

Merritt Wever plays Detective Karen Duvall.

Unbelievable's Detective Karen Duvall, a.k.a. Detective Stacey Galbraith in real life, is the detective who encountered another rape accusation from a 26-year-old student. In the series, she works with fellow detective Rasmussen on an investigation of multiple similar rape accounts around the Denver area. Eventually, they connect them and get justice for Marie and imprison her rapist, Marc O'Leary.

Merritt had the ongoing role of Zoey Barkow in Nurse Jackie. She also won a Primetime Emmy Award her supporting role as Mary Agnes in Godless.

Danielle MacDonald plays Amber.

Danielle MacDonald plays Amber, who is also a sexual assault survivor who keen memory of the attack helps the detectives eventually find her and Marie's rapist.

This isn't Danielle's first Netflix gig. Danielle played Willowdean, Jennifer Aniston's character's daughter, in Dumplin', a movie about beauty pageant queens.

Vanessa Bell Calloway plays Sarah.

Vanessa Bella Calloway plays Sarah, one of the sexual assault survivors in Unbelievable.

Vanessa previously appeared in Shameless, Coming to America, and Saints and Sinners.