The model, 33, looked stunning in a pair of skimpy black bottoms and a leopard print bikini top for the beach outing.
Pia gave her lover quite the eyeful as they later chatted on the sand The exchange quickly turned playful with Pia throwing a wry smile at her photographer beau.
Back home: It comes after Pia recently spent time in Los Angeles, after going public with her boyfriend, Patrick Whitesell, earlier this month Lauren is now in a relationship with Amazon boss Jeff Bezos, the world's richest man.
In the water, Pia's attention was clearly on her boyfriend as she wrapped her legs around his waist and embracing him tightly.
While we are talking about her performances and the actress as a whole, we want to now take you on a ride through a Pia Miller bikini photo gallery.
Standing behind her beau, Pia wrapped her arms around Tyson, grabbed her phone and snapped a selfie to document the romantic interlude.
The couple kept close as they strolled out of the water with Tyson clinging close to the Chilean-born beauty Meanwhile, businessman Tyson flaunted his tattooed chest and arms in a pair of black board shorts.
These Pia Miller big butt pictures are sure to leave you mesmerized and awestruck.