Julia Roberts may be 47-years-old, but she's still a stunning beach babe.

The mother-of-three showed off her enviable figure in a dark blue bikini during a beach vacation in Mexico's upscale resort of Cabo San Lucas on Sunday.

The Pretty Woman star was spotted taking photos on her long lens camera while her husband Danny Moder went boogie boarding in the ocean.

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Beach babe: Julia Roberts wore a dark blue two-piece during a beach vacation at Cabo San Lucas on Sunday

In her sights: The Erin Brokovich star busied herself taking photos with a long lens camera as husband Danny Moder went boogie boarding in the surf

Ageing well: The 47-year-old mother of three showed she still looks terrific in a bikini

Julia chose to hang out on a shaded balcony as she scanned to beach for things to photograph.

It's obvious the Runaway Bride star takes good care of herself as she juggles her acting career with raising her children with Moder, 46.

The couple are parents to 10-year-old twins Hazel and Phinnaeus, and Henry, who just turned eight this month.

Watch the birdie: The Hollywood star appeared to have taken up a new hobby as she snapped picture after picture while standing on a deck shaded by palm fronds

Still a pretty Woman: The Runaway Bride actress appeared relaxed and happy

Natural beauty: The auburn-haired actress was careful to keep her pale skin out of the harsh sun during the hottest part of the day

Taking a break from the camera: The America's Sweetheart actress looked at ease with the large equipment

Twice as nice: The Everyone Says I Love You hit maker wore Ray-Bans and her wedding ring

Not camera shy: At one point the Pelican Brief beauty looked like she was ready for a cool dip in the ocean

A love shack: The Ocean's Eleven superstar was shooting from a hut with a straw roof

Later in the day, the Hollywood star joined her shirtless husband on the sand.

The Flatliners star covered up in a long-sleeved two-toned shirt and wore frayed denim shorts as she helped pack up towels and other beach items.

Her long hair, that had previously been flowing loose, was tied up into a bun with her sunglasses perched above her forehead.

The Ocean's Eleven star had on no jewelry except her wedding ring.

The Georgia native looked on-trend with her Ray-Ban sunglasses that stayed on the entire time. 

Moder, whose hair was damp and windswept, seemed exhilarated after his boogie board session as water dripped from his wet board shorts while he chatted with his wife.

Quick change: When she did leave the shade and joined her husband on the sand, Julia covered up in a long-sleeved shirt and frayed denim shorts

Going the distance: Julia has been married to Moder for 13 years and they are parents to 10-year-old twins Hazel and Phinnaues and eight-year-old Henry

Helping hand: Julia joined Moder in carrying beach items after the cinematographer finished his boogie boarding session

Julia recently wrapped filming on the thriller Secret In Their Eyes and Moder also worked on the film as the cinematographer.

The movie, directed and written by Billy Ray, co-stars Nicole Kidman and Chiwetel Ejiofor.

The Erin Brokovich star fell for the film cameraman on the set of The Mexican in 2000, while she was dating Law & Order star Benjamin Bratt and he was married to first wife Vera.

They wed on July 4, 2002. 

Down time: The barefoot 47-year-old clearly enjoyed spending a low key day at the beach

Surf's up: Moder, who filmed the surfing documentary 180° South, looked exhilarated, if a little damp, after his afternoon in the water