She's an Academy Award-winning actress, but also a proud wife and mother to three children, as her back tattoo reveals.

And Erin Brockovich star Julia Roberts was flashing her inking when she was spotted on a family vacation in Puerto Vallarta, Mexico over the weekend, lounging by the pool and flashing her stunning physique.

Roberts, 52, also flashed her lower back tattoo, which displays the names of her three children with cinematographer husband Danny Moder: twins Phinneus and Hazel, both 15, and younger son Henry, 12, alongside her spouse's initials. 

Thousand-watt smile: Julia Roberts was spotted in family vacation mode in Puerto Vallarta, Mexico over the weekend

The names of her children are arranged around Moder's initials, which Julia revealed in a 2014 visit to The Ellen DeGeneres Show she got before their 2002 wedding.

When asked if she has any tattoos, Julia was relatively bashful as she told the host: 'Well, some things I can tell you the answer to and some things I'll tell you later. I have all my children's names and my husband's initials.'

Julia was flashing her tattoos while hitting the pool in an athletic navy blue two-piece swimsuit as she made the most of her incredibly lithe frame.

She also wore what appeared to be a golden nameplate pendant around her neck, as well as a large pair of aviator sunglasses. Moder, 51, was also spied by the pool, as well as in the ocean surf, practicing his surf moves. 

In shape: She was seen lounging by the pool and flashing her toned, stunning physique

Lounging: With her highlighted tresses wet from the pool, Julia sported an athletic navy blue two-piece swimsuit

Perching: Roberts was wearing a large pair of aviator sunglasses

Movie star style: The 5ft9in actress was seen perching on some pool furniture and then making her way alongside the pool

The 5ft9in actress was seen perching on some pool furniture, and laughing with her family and fellow vacationers.

Roberts and Moder have been married since July 4, 2002, after meeting on the set of her 2001 film opposite Brad Pitt, The Mexican.

In 2018, she told her friend Gwyneth Paltrow on the Goop podcast that she felt a 'seismic shift' when she first met Danny. 

Wife and husband: Roberts and Moder have been married since July 4, 2002, after meeting on the set of her 2001 film opposite Brad Pitt, The Mexican

Age defying: Roberts looked fit and relaxed, seeming years younger than her age

Not a tramp stamp: Julia flashed her lower back tattoo, which displays the names of her three children and initials of husband Danny Moder

Ever since she broke out in the late '80s in films like Satisfaction and Mystic Pizza, Julia had been linked with several famous leading Hollywood men, including Kiefer Sutherland, Benjamin Bratt and Matthew Perry, to name a few.

She was also married to country star and actor Lyle Lovett, from 1993 to 1995, before her marriage to Moder. 

After back-to-back Oscar nominations in 1990 and 1991 for Steel Magnolias and Pretty Woman, respectively, Roberts would have to wait ten more years before being awarded a statuette for her leading performance in Erin Brockovich, based on the real-life legal clerk-turned-activist.

Up next for Roberts is the adaptation Little Bee, based on the Chris Cleave novel, which she will also be producing.

Hanging ten: Moder, 51, was also spied by the pool, as well as in the ocean surf, practicing his surf moves

Accomplished cameraman: Danny has worked on other films featuring his wife, including Mona Lisa Smile and The Normal Heart, and last year was a director of photography on Netflix's Dead to Me

Bit of gold: Julia also wore what appeared to be a golden nameplate pendant around her neck 

After vacation is over: Up next for Roberts is the adaptation Little Bee, based on the Chris Cleave novel, which she will also be producing