Matt Damon's wife and mother-of-four Luciana Barroso flaunts her washboard abs ...

She and husband Matt Damon are enjoying downtime with their family in Byron Bay, spending time with locals Chris Hemsworth and Elsa Pataky. 

And on Friday, Luciana Barroso was spotted at the beach with her man and Elsa, flaunting her washboard abs in a tiny string bikini. 

On the outing, the famous faces were joined by their children and some friends, as they lapped up the good weather.

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One hot mama! Matt Damon's makeup free wife and mother-of-four Luciana Barroso flaunts her washboard abs in a bikini...as she and her family join Elsa Pataky at the Beach in Byron Bay

Luciana has three children with Matt, Isabella, 11, Gia, nine, and Stella, seven, and older daughter, Alexia, from a previous relationship.

Elsa meanwhile has three children with Thor star Chris, daughter India Rose, five, and twin sons, Sasha and Tristan, four.

Chris was not present at the beach outing. 

Luciana stunned in a pink and maroon printed bikini, which she teamed with a printed sarong which she tied around her waist. 

Hanging out: Seen is Elsa Pataky on the day

Hanging out: Seen is Elsa Pataky on the day

Beach babe! She wore a printed sarong on the day, and a black singlet on top of her bikini

Beach babe! She wore a printed sarong on the day, and a black singlet on top of her bikini

 Beach babe! She wore a printed sarong on the day, and a black singlet on top of her bikini

In good spirits: Matt was seen lifting a pull cart for the kids

In good spirits: Matt was seen lifting a pull cart for the kids

All in the details: She also wore a straw beach hat and layered gold necklaces, and an anklet

All in the details: She also wore a straw beach hat and layered gold necklaces, and an anklet

She also wore a straw beach hat and layered gold necklaces, and an anklet. 

Luciana had her dark locks out and over her shoulders, and showcased a soft golden glow on the day. 

Elsa meanwhile, looked chic in a white summer dress, which she wore over her bikini. 

She also wore a straw hat on the day. 

Family: Elsa meanwhile has three children with Thor star Chris, daughter India Rose, five, and twin sons, Sasha and Tristan, four

Family: Elsa meanwhile has three children with Thor star Chris, daughter India Rose, five, and twin sons, Sasha and Tristan, four

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