The main cast of the TV series "The Rookie" includes:
- Nathan Fillion as Officer Jonathan “John” Nolan, the oldest rookie at the LAPD's Mid-Wilshire Division.
- Alyssa Diaz as Detective Angela Lopez, an LAPD officer and training officer.
- Richard T. Jones as Lieutenant Wade Grey, a sergeant and watch commander at the Mid-Wilshire Station.
- Titus Makin Jr. as Officer Jackson West (seasons 1-3), a committed rookie and son of the head of LAPD's Internal Affairs Division.
- Mercedes Mason as Captain Zoe Andersen (season 1; guest season 3), Nolan's commanding officer.
- Melissa O'Neil as Sergeant Lucy Chen, an ambitious rookie who becomes an undercover officer and sergeant.
- Eric Winter as Tim Bradford, a training officer and detective.
- Afton Williamson as Talia Bishop (season 1).
- Mekia Cox as Nyla Harper (seasons 2-present).
- Shawn Ashmore as Wesley Evers (seasons 3-present; recurring earlier seasons), a defense lawyer who marries Lopez.
- Jenna Dewan as Bailey Nune (season 4-present; guest season 3), a firefighter lieutenant and Nolan's wife.
- Tru Valentino as Officer Aaron Thorsen (seasons 5-6).
- Lisseth Chavez as Officer Celina Juarez (season 6-present).
The series includes other recurring and guest characters as well, with ongoing developments through its seasons.
