Rachel McAdams is said to be locking down the female lead role in season two of HBO’s “True Detective.”

Sources tell Variety HBO has offered McAdams the part opposite Colin Farrell and Vince Vaughn. Taylor Kitsch is also expected to land the role of the fourth lead.

Several other actresses have been considered for the part, including Jessica Biel and Malin Ackerman, but McAdams has been seen as the frontrunner for the past few weeks. HBO could not immediately be reached for comment.

Helmer Justin Lin is set to direct the first two episodes of season two. “True Detective” creator Nic Pizzolatto has been busy writing the second season, which is set in California and revolves around three police officers and a career criminal who navigate a web of conspiracy in the aftermath of a murder.

McAdams and Kitsch are expected to play cops alongside Farrell, while Vaughn plays the crime boss whose empire is threatened when his partner is murdered.

McAdams, repped by WME and Magnolia Entertainment, is already set to have a busy 2015 with the untitled Cameron Crowe pic and the Jake Gyllenhaal boxing pic “Southpaw” both bowing next year. She was most recently seen opposite Phillip Seymour Hoffman in “A Most Wanted Man.”

With three of its four leads in place (and the fourth said to be near a deal), HBO’s True Detective has moved on to casting some heavily recurring roles for Season 2.

As previously reported, Vince Vaughn (Wedding Crashers) will play Frank Semyon, a career criminal struggling to move into legitimate enterprise, and Colin Farrell (Alexander) will play Ray Velcoro, a police detective with torn allegiances. Taylor Kitsch (Friday Night Lights) is said to be playing a detective, while Rachel McAdams is rumored to be circling the fourth and final lead role, as another detective.

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In addition, all said to be near deals, per our sister site Deadline, are Abigail Spencer (Rectify), Kelly Reilly (Black Box), Michael Irby (The Unit) and Leven Rambin (The Hunger Games).

Irby would play Elvis, the partner of McAdams’ character, Spencer is believed to be playing the survivor of a sexual assault and Rambin a beauty with a checkered past. Reilly’s role is described by Deadline as “the self-possessed Morgan.”

Season 2 of the acclaimed drama begins shooting later this year.

The eight-episode second season of the Nic Pizzolatto crime drama revolves around three police officers (Farrell, Kitsch and McAdams) and a career criminal (Vaughn) who must navigate a web of conspiracy in the aftermath of a murder. Here are the official descriptions for Kirsch, McAdams and Reilly’s characters.

Rachel McAdams as Ani Bezzerides, a Ventura County Sheriff’s detective whose uncompromising ethics put her at odds with others and the system she serves.

Taylor Kitsch as Paul Woodrugh, a war veteran and motorcycle officer for the California Highway Patrol, running from a difficult past and the sudden glare of a scandal that never happened.

Kelly Reilly as Jordan, Frank Semyon’s (Vaughn) wife, a former D-list actress who is a full partner in his enterprises and ambitions.

In addition to the five regulars, True Detective has cast a slew of recurring players for Season 2, including Michael Irby, Abigail Spencer , Leven Rambin, Riley Smith, Lolita Davidovich, James Frain, Adria Arjona, Chrsitian Campbell, Michael Hyatt and Yara Martinez

McAdams and Taylor Kitsch are officially confirmed by HBO as regulars.