Gwyneth Paltrow, 51, flaunts her VERY toned washboard abs in a black string bikini during lavish family trip to Mexico

Gwyneth Paltrow was spotted enjoying a relaxing day in the sun ahead of the holiday weekend while on vacation with husband Brad Falchuk in Mexico.

The 51-year-old Oscar winner — who recently turned heads while attending a Goop party — and her boyfriend, 52, were joined by her children Moses, 17, and Apple, 19.

Paltrow, who grew up in the entertainment industry, showed off her fit body in a black string bikini.

Her signature long blonde locks were wet as she, her family and a group of friends spent the day outside on the water.

Sometimes she wore a wide-brimmed straw hat and curled up with a book in her hand.

The 51-year-old Oscar winner and her boyfriend, 52, were joined by her children Moses, 17, and Apple, 19

Paltrow, who grew up in the entertainment industry, showed off her fit body in a black string bikini

Her signature long blonde locks were wet as she, her family and a group of friends spent the day outside on the water

The Iron Man actress held her phone and black sunglasses

Moses looked tall and slim as he wore gray trunks and a dark-colored striped shirt

Moses looked tall and slim as he wore gray trunks and a dark-colored striped shirt.

Gwyneth seemed to be loving her only son, whom she shares with ex-husband Chris Martin.

Apple followed her mother's example and also opted for a few different black two-piece swimsuits while she and her friends hung out on a boat.

One matching swimwear set consisted of a ruffled halter top and thong bottoms.

Another example, which she modeled at a different time of the day, consisted of a triangle top and thong bottoms.

The teen looked like Paltrow and wore her golden locks down so they enveloped her face in voluminous, tousled waves.

Brad, who married the Hollywood entertainer in 2018, spent quality time with his stepchildren in gray board shorts with white stripe detailing.

He was shirtless, showing off his impressive stomach and wearing a pair of black water shoes.

Sometimes she wore a wide-brimmed straw hat and curled up with a book in her hand

Gwyneth seemed to be loving her only son, whom she shares with ex-husband Chris Martin

Paltrow was also spotted wearing a bright pink swimsuit a day earlier

The Goop founder looked relaxed as she took a call

Apple followed her mother's example and also opted for a black two-piece swimsuit while she and her friends hung out on a boat

Resembling Paltrow, the teen wore her golden locks down, framing her face in voluminous, tousled waves.

Brad, who married the Hollywood entertainer in 2018, spent quality time with his stepchildren in gray board shorts with white stripe detailing

Last year, the businesswoman and her brood enjoyed a holiday at the same time when they traveled to Barbados.

The acclaimed artist opened her doors in November People and said Falchuk reminds her of her late father Bruce Paltrow, who died in 2002 after succumbing to oral cancer.

“He has things that [are] reminds me of my father. “He's like a Jewish TV writer with blue eyes, a heart of gold and a great sense of humor,” she explained. 'In the end I chose my father.'

Brad took part in the interview and praised his wife's loyalty to her loved ones.

“If she loves you, she's your champion. It feels just as good to her when things are going well for her,” he noted.

'She literally screams when she hears good news from someone. She is the perfect woman,” the television writer said.

Last year, the businesswoman and her brood enjoyed a holiday at the same time when they traveled to Barbados

Falchuk's long, textured brown locks flowed in the wind

Moses wore blue swim trunks for a dip in the water

The teen, who favors his musical dad, relaxed with a bikini-clad pal

Last month, Gwyneth shared that her children have been “responsible” with the freedom she has given them

Apple modeled a different swimsuit at a different time of day; it consisted of a triangle top and thong bottoms

She enjoyed the company of several friends, who themselves wore colorful swimsuits

The group took to the water on a white Pinque yacht

Falchuk recently said of Gwyneth: 'She's the perfect woman'

Gwyneth countered People that her children have been 'responsible' with the freedom she has given them.

“They treated it with reverence. I've always said, 'I don't have to give you a curfew unless you give me a reason to give you a curfew,' something like that.”

She continued, “They are responsible and have never done anything crazy.”

The proud mother added: “I really enjoyed having teenagers. I mean, Apple is in her last year of teen years now, which I think is so crazy that she'll be turning 20 on her next birthday. I don't know exactly how that happened.'

She is stepmother to her husband's two children, Isabella Falchuk, 19, and Brody Falchuk, 17.