Carla Gugino, Lucy Liu and Paul Giamatti join the picket lines in New York, as Seth Rogen and Martin Starr march in LA as the SAG-AFTRA strike enters its third week

Carla Gugino, Lucy Liu and Paul Giamatti were among the celebrities who lined the picket line in New York on Monday.

The actors are in their third week of protests for better wages and protection from major Hollywood studios.

Carla, 51, looked comfortable in a black V-neck top and red jeans.

The Leopard Skin star styled her dark, curly hair into a high ponytail and sported large aviator glasses as she joined her fellow strikers in New York.

Lucy, 54, marched past her in solidarity wearing a white T-shirt and jeans and a brown leather belt.

She also tied a brown leather travel bag around her waist.

Strike: Lucy Liu, 54, and Carla Gugino, 51, joined their fellow actors on the picket line in New York on Monday in the third week of the SAG-AFTRA actors’ strike

The Shazam! The Fury of the Gods star placed a faded black-billed cap over her dark bob and wore large, dark sunglasses.

Paul Giamatti, 56, tried to stay cool in the concrete wearing a gray collared shirt, blue shorts and black sneakers.

The Oscar nominee wore a turquoise billed cap.

David Harbour, 48, wore a black SAG-AFTRA Strong with black jeans and sneakers.

The Stranger Things star wore a black-billed cap, a warning sign and a cup of coffee.

Samantha Mathis, 53, beat the heat in green khaki shorts and a black SAG-AFTRA T-shirt and sneakers.

The Billions star pulled up her blonde locks and placed them under a black cap.

David Krumholtz, 45, joined the picket line in a black and tan plaid shirt, tan shorts and sneakers.

Strength in numbers: Oscar nominee Paul Giamatti, 56, took part in the demonstration.  About 160,000 actors have been fired since the strike began on July 13

Strength in numbers: Oscar nominee Paul Giamatti, 56, took part in the demonstration. About 160,000 actors have been fired since the strike began on July 13

Holding sign: Paul wore a gray shirt with a union button while holding a picket sign in NYC

Holding sign: Paul wore a gray shirt with a union button while holding a picket sign in NYC

Protest: Stranger Things' David Harbor and Billions star Samantha Mathis showed up for the protest

Protection: Actors seek higher wages and protection from artificial intelligence

Protest: Stranger Things’ David Harbor and Billions star Samantha Mathis showed up for the protest. Actors seek higher wages and protection from artificial intelligence

Picket Line: David wore a black SAG-AFTRA shirt and matching pants as he walked the picket line

Picket Line: David wore a black SAG-AFTRA shirt and matching pants as he walked the picket line

Sit down: Oppenheimer star David Krumholtz, 45, joined the protest in New York.  He wrote a lengthy post on Instagram claiming, “AMPTP can put an end to this nonsense if you sit down with @sagaftra's lead.  Put thousands and thousands of people back to work,” he said

Sit down: Oppenheimer star David Krumholtz, 45, joined the protest in New York. He wrote a lengthy post on Instagram claiming, “AMPTP can put an end to this nonsense if you sit down with @sagaftra’s lead. Put thousands and thousands of people back to work,” he said

Strong words: 'We will not break.  We won't even budge.  We will get back to work with relatively fair contracts.  This won't stop until we get what we deserve,

Strong words: ‘We will not break. We won’t even budge. We will get back to work with relatively fair contracts. This won’t stop until we get what we deserve,” David wrote on social media

The Oppenheimer actor shared a photo of himself on social media and wrote about what he saw as a barrier to a new agreement between the actors and studios.

“AMPTP can put an end to this nonsense by sitting down once with @sagaftra’s leadership. Put thousands and thousands of people back to work,” he explained.

“Make no mistake, there are GOOD PEOPLE on the other side of this. But they are terrified of rocking the AMPTP’s boat for fear of being blacklisted,” he claimed, adding, “That’s a mockery and a goddamn shame.”

“There are a small handful of really powerful people in Hollywood,” the White House plumbers argued, saying, “they sit, clandestinely, in the shadows, on the boards of directors of conglomerate companies of which Hollywood studios represent only a percentage.”

“They define the conditions that so many now struggle with. The game is a killer gamble.’

LA picket: In Los Angeles, Seth Rogen, 41, and Martin Starr, 41, walked for Paramount Studios

LA picket: In Los Angeles, Seth Rogen, 41, and Martin Starr, 41, walked for Paramount Studios

Double duty: Seth and Martin are both writers and actors.  Writers have been on strike since May 2 when their contracts expired.  It is the first time since 1960 that actors and writers have gone on strike simultaneously

Double duty: This is the first time since 1960 that actors and writers have gone on strike simultaneously

Double duty: Seth and Martin are both writers and actors. Writers have been on strike since May 2 when their contracts expired. It is the first time since 1960 that actors and writers have gone on strike simultaneously

Writers care: Writers are looking for better wages and working conditions.  They are also concerned that studios will replace them with AI to write scripts

Writers care: Writers are looking for better wages and working conditions. They are also concerned that studios will replace them with AI to write scripts

He ended with a promise to those in power.

“We won’t break. We won’t even budge. We will get back to work with relatively fair contracts. This won’t stop until we get what we deserve.’

In Los Angeles, Seth Rogen, 41, and Martin Starr, 41, walked for Paramount Studios.

Seth, who is both a standout writer and actor, looked comfortable in a beige linen shirt, tan pants and a green bucket hat.

Martin wore a long-sleeved SAG-AFTRA T-shirt, black pants and sneakers.

The Party Down actor wore a white and green bucket hat in the blazing California sun.

Actors and writers converged on the Los Angeles picket lines, including Marvel Cinematic Universe star Clark Gregg, 61.

The Avengers and Agents of SHIELD star wore a black shirt with an image of a striking Homer Simpson and brown pants.

He carried a picket sign as he protested outside Paramount Pictures Studios.

Max Greenfield, 43, also pecked outside Paramount while wearing a blue “Los Dodgers” cap, a plain white T-shirt and blue shorts.

He also wore sneakers and sunglasses as an accessory while picketing.

Picket Line: Actors and writers converged on the Los Angeles picket lines, including Marvel Cinematic Universe star Clark Gregg

Picket Line: Actors and writers converged on the Los Angeles picket lines, including Marvel Cinematic Universe star Clark Gregg

Striking Simpson: The Avengers and Agents of SHIELD star wore a black shirt with an image of a striking Homer Simpson in support of the Writers Guild of America, along with brown pants

Striking Simpson: The Avengers and Agents of SHIELD star wore a black shirt with an image of a striking Homer Simpson in support of the Writers Guild of America, along with brown pants

TV star: Max Greenfield, 43, also peaked outside Paramount wearing a blue 'Los Dodgers' cap, plain white T-shirt and blue shorts

TV star: Max Greenfield, 43, also peaked outside Paramount wearing a blue ‘Los Dodgers’ cap, plain white T-shirt and blue shorts

Casual Style: He also wore sneakers and sunglasses as an accessory while picketing

Casual Style: He also wore sneakers and sunglasses as an accessory while picketing

Actors went on strike on July 13, joining the already striking members of the Writers Guild of America who left on May 2, after their contracts expired.

It is the first time since 1960 that actors and writers have gone on strike simultaneously.

Both groups demand higher wages, better working conditions and protection against artificial intelligence.

Writers are concerned that studios will replace them with AI to write scripts, while actors worry that their images and performances will be digitally altered without permission or compensation.