Charlize Theron, 49, soaks up the sun in a black swimsuit on family vacation to Mexico

Charlize Theron wore a chic black bathing suit while vacationing in Los Cabos, Mexico on Monday. HEM / BACKGRID

Charlize Theron put her fit physique on display while prancing around in a sleek black swimsuit in Los Cabos, Mexico, on Monday.

The “Atomic Blonde” actress, 49, was joined by her mother, Gerda Jacoba Aletta Maritz, and her 9-year-old daughter August as she relaxed by the pool a day before New Year’s Eve.

Theron put on a cheeky display in the sensual halter-top bathing suit that clung to her slim figure and emphasized her bronzed shoulders.

The “Bombshell” actress was seen rocking the halter-top one-piece while hanging by the pool. HEM / BACKGRID She completed the look with a black hat and sunglasses. HEM / BACKGRID

She accessorized with a black trucker hat emblazoned with the word “SIX” on the front and large-frame black sunglasses.

At one point, the Oscar winner was seen applying sunscreen in order to protect her skin from the blazing hot sun.

She was also spotted reclining on a cozy lounge chair as she prepared to ring in the new year with her family members.

Theron, seen here in March 2024, was joined by her daughter August and her mom Gerda. Theron, seen here with her kids in March 2024, is also mom to daughter Jackson.

Theron — who adopted August and her other daughter, 12-year-old Jackson, in 2015 and 2012 respectively — has kept her kids relatively out of the spotlight.

Last September, she shared rare photos with her brood during a fun trip to Disneyland ahead of Halloween.

“It’s not officially spooky season until we hit @disneyland 👻,” the “Mad Max: Fury Road” star captioned a slideshow of snaps at the time.

The movie star, seen here in September 2024, has kept her kids out of the spotlight. She posted photos from their trip to Disneyland in September 2024.

Nearly six months prior, she shared a glimpse of her trip to Disney World in Florida with her two daughters.

“Spring break mode activated,” she captioned her Instagram post at the time along with images capturing the movie star riding the TRON Lightcycle/Run ride and standing outside Cinderella’s Castle.

Theron has also started bringing her children to some A-list events.

She took August to the Dior pre-fall fashion show in April last year while Jackson joined her mom at Dior’s runway show in September 2023.

The mom of two, seen here in November 2024, adopted August and Jackson in 2015 and 2012 respectively. Getty Images for Netflix © 2024 The “Atomic Blonde” star, seen here in November 2024, always knew she wanted to adopt. Xavier Collin/Image Press Agency / SplashNews.com

Theron always knew that she wanted to adopt her children when she was ready to be a mom.

“Even when I was in relationships, I was always honest with my partners, that adoption was how my family would look one day,” she told People in 2018.

“This was definitely not a second option for me. It was always my first.”