Kate Winslet-Led HBO Drama Adds Julianne Nicholson, Jean Smart

Four other actors have also joined the cast of the drama set in a small Pennsylvania town
Gary Gershoff/Getty Images; Rachel Luna/Getty Images
Julianne Nicholson (left), Jean Smart

HBO is filling out the cast of Kate Winslet-led limited series Mare of Easttown.

Six actors have joined the series, which stars Winslet as a detective in a small Pennsylvania town: Julianne Nicholson (Law & Order: Criminal Intent), Jean Smart (Watchmen), Angourie Rice (Spider-Man: Far From Home), Evan Peters (American Horror Story), Cailee Spaeny (On the Basis of Sex) and David Denman (The Office, Outcast).

Winslet, who's also an executive producer, plays Mare Sheehan, whose life is crumbling around her as she investigates a murder. Nicholson, who's coming off Netflix's Blonde and HBO's The Outsider, plays Lori Ross, Mare's best friend since childhood. She knows how mercurial Mare can be but loves and accepts her as she is.

Smart plays Mare's mother, Helen. Stubborn, opinionated and a devout Catholic, Helen never holds back on her opinions, whether they're solicited or not.

Rice will play Siobhan, Mare and Frank's (Denman) daughter, a lovely, brilliant young woman who's also rebellious and strong headed. Denman's Frank is an affable math teacher at the local high school. He and Mare got married at age 20 but split up years ago.

Peters will play Colin Zabel, a county detective called in to help with Mare's investigation, much to her chagrin. Spaeny rounds out the group as Erin McMenamin, a lonely teen who lives with her volatile father and the only love in her life, infant son DJ.

Creator Brad Ingelsby (Run All Night, American Woman) is writing every episode and will serve as showrunner, and Gavin O'Connor (The Accountant) will direct the entire project. They executive produce with Winslet, Gordon Gray and Paul Lee and Mark Roybal of wiip. The series is a co-production of HBO and wiip.

Nicholson is repped by UTA; Smart by WME and Untitled Entertainment; Rice by WME, Catherine Poulton Management and Sloane Offer; Peters by CAA; Spaeny by WME, Identity Agency Group in the U.K. and Hansen Jacobson; and Denman by Berwick & Kovacik, UTA and Schreck Rose. 

Deadline first reported the news.