The TV series has a star-studded ensemble.

Erik was 18 at the time, and Lyle was 22.

The new series, created by Ryan Murphy and Ian Brennan, revolves around the brutal slayings.

Menendez brothers, Lyle and Erik, in a courtroom wearing blue prison uniforms, sitting at a wooden table during their trial

He also starred in the TV seriesGeneral Hospital(2021-2024), playing Spencer Cassadine.

Cooper Koch portrays Erik Menendez (one of the brothers).

He also starred in thehorror filmSwallowed (2022), playing Benjamin.

Nicholas Alexander Chavez at a film premiere wearing a brown suit with a white dress shirt

Javier Bardemportrays Jose Menendez (Erik and Lyles father).

He also appeared in the movieMother!

(2017), where he played the character Him.

A person stands indoors, wearing a formal suit and tie

Chloe Sevigny portrays Mary Louise Kitty Menendez (Erik and Lyles mother).

Nathan Laneportrays Dominick Dunne (an investigative journalist).

He also starred in the TV seriesThe Gilded Age(2022-2023), playing Ward McAllister.

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Ari Graynor portrays Leslie Abramson (criminal defense attorney and lead counsel for Erik Menendez).

Dallas Roberts portrays Dr. Jerome Oziel (the therapist of Erik Menendez).

He also starred in the TV seriesInsatiable(2018-2019) as the character Bob Armstrong.

Cooper Koch in a black suit and tie with neatly styled hair, standing at an event

He’s also starred in the TV seriesOzark(2017), playing Roy Petty.

Enrique Murciano portrays Carlos Baralt (Lyle and Eriks uncle and brother-in-law to Jose Menendez).

He’s also starred in the TV seriesThe Night Agent(2023), playing Ben Almora.

Cooper Koch is smiling and holding up his hand in a dimly lit setting with colorful lights in the background.

Michael Gladis portrays Tim Rutten (Leslie Abramson’s husband).

Drew Powell portrays Detective Tom Linehan (detective on the case).

Charlie Hall portrays Craig Cignarelli (Erik’s friend).

Javier Bardem, in a white shirt and dark blazer, smiles while posing in front of a dark background

Gil Ozeri portrays Dr. William Vicary (a psychiatrist).

Jeff Perry portrays Peter Hoffman (Jose’s business partner).

Javier Bardem with a serious expression, wearing a casual shirt, looking towards the camera in an indoor setting with a table and chair in the background

He’s also appeared on the TV seriesScandal(2012-2018) as Cyrus.

Tessa Auberjonois portrays Dr. Laurel Oziel (Jerome’s wife).

She’s also starred inHow I Met Your Father(2022-2023), playing Naomi.

Chloë Sevigny at the 'Monsters: The Lyle and Erik Menendez Story' event, wearing a large, oversized jacket

Tanner Stine portrays Perry Berman (friend of Erik and Lyle and former tennis coach).

Larry Clarke portrays Brian Andersen (uncle of Lyle and Erik).

He’s also appeared in the TV seriesHeels(2021-2023), portraying Ted Day.

Chloë Sevigny with others sit attentively watching something in the background

Jade Pettyjohn portrays Jamie Pisarcik (dated Lyle and was a tennis pro).

She’s also starred in the TV seriesBig Sky(2020-2021) as Grace Sullivan.

Marlene Forte portrays Marta Cano (Lyle and Erik’s aunt).

A person wearing glasses and a suit is smiling while looking to the side

He also appeared inCruel Summer(2023) as Steve Chambers.

Nathan Lane dressed in a 19th-century suit with a cravat, smiling and standing inside a period-style room

Ari Graynor with long wavy hair, wearing a strapless dress and large earrings, smiles at the camera.

Two women, one with long dark hair and another with blonde hair wearing a floral robe, are sitting closely and talking, appearing to be in a serious conversation

Man in dark shirt stands in front of Netflix's "Monsters: The Lyle and Erik Menendez Story" promotional backdrop

Debby Ryan stands beside Dallas Roberts in a plaid blazer, holding a drink. Both appear to be engaged in a serious conversation indoors

Leslie Grossman on the red carpet, wearing a long black lace dress and holding a black clutch, at the premiere of "Monsters: The Lyle and Erik Menendez Story."

Leslie Grossman is sitting indoors, wearing a beige vest over a white shirt, with glasses and wavy shoulder-length hair. She appears to be in a serious moment

Jason Butler Harner stands in front of a promotional background. He is wearing a tan blazer over a white shirt and white pants. His hair is styled, and he has a slight smile

Two men are conversing in a dimly lit room, one wearing a baseball cap and the other, Pedro Pascal, is touching the other man's neck

Enrique Murciano in a striped T-shirt, floral-patterned coat, and tinted glasses poses at a Netflix event

Enrique Murciano and another man are having a conversation.

A bearded man in a suit and a woman in a casual blue dress smile on a red carpet at the "The Beauty Collection" event backdrop. Names of individuals not known

Michael Gladis wearing sunglasses and a green shirt with a serious expression stands outside against a blue sky

Drew Powell smiling in front of a backdrop with text that reads "Pasadena Playhouse" and "Of the Ones."

Drew Powell, with blonde hair and wearing a sleeveless vest, stands in a dimly lit industrial setting, appearing concerned. Audience members are visible in the background

Four people pose for a photo against a backdrop that says "Tuesday." Names of the other people are unknown

Charlie Hall with short hair, wearing a casual polo shirt, looks to his right in a dimly lit room with a fireplace in the background

Gil Ozeri smiles, wearing a black turtleneck and gray checkered pants, standing in front of a Film Independent event backdrop

Gil Ozeri with glasses and casual sweater looks up at a standing person. Natural background of plants visible through window.

An older man with short, grey hair wearing a dark blazer over a black shirt at an event with a backdrop that mentions "The Actors Fund" and "SCANDAL."

Jeff Perry in a suit sits on a striped sofa, holding a folder and pen, appearing deep in thought. There are papers and a coffee cup nearby

Amy Brenneman poses in a floral-patterned dress on the red carpet for the 'Clue: On Stage' event, hosted by Center Theatre Group

Tessa Auberjonois sits at a desk, wearing a floral jacket over a white blouse.

Tanner Stine in a patterned white shirt and black pants stands on a red carpet with a YouTube Originals backdrop

Tanner Stine in a dark long-sleeve shirt, standing in a kitchen

Larry Clarke in front of a movie poster featuring Eric Edelstein, Mo Gaffney, and Brian Dennehy

Three people are gathered around a kitchen table, including Larry Clarke, engaging in conversation and looking at a smartphone

Jade Pettyjohn in a tailored black suit with a plunging neckline poses on the Tribeca Festival red carpet

A person with wet hair looking up with a distressed expression

Marlene Forte wearing a floral-patterned dress, standing in front of a backdrop with text graphics

Marlene Forte sits at the bench with an American flag and the seal of California behind her

Paul Adelstein with a beard, wearing a green suit with a dark shirt and a green tie, poses for a photo in front of a dark backdrop

Paul Adelstein and a woman face each other near a lake with mountains in the background