The former Page 3 model set pulses racing as she posed up a storm in the racy number in London.
Rhian, 31, left very little to the imagination in the plum swimsuit which showed off her incredible figure.
The plunging neckline displayed the busty bombshell’s ample cleavage as it spilled out of the garment.
Flashing the flesh, Rhian confidently showed off her sensational body as she struck a series of sultry poses to the camera.
The beauty’s swimsuit featured a black belt which cinched in her waist, further highlighting her slender figure.
The thigh-high cut on the swimsuit also allowed Rhian to flaunt her lean pins whilst strutting her stuff on the street.
The blonde’s tresses were styled in tousled waves which cascaded down to her ample bosom.
Rhian’s stunning looks were accentuated with plenty of blusher and nude lipstick.
The model previously revealed on Twitter she was shooting for her 11th annual calendar.
The star also uploaded a behind the scenes shot of herself on Instagram in the eye-popping swimsuit.
Standing to the side, Rhian showcased her mind-boggling curves and drew attention to her sizeable assets by resting her hand on her chest.
She captioned the image: “Today’s glam team! (minus @makeupbymikey who gave me life!) #BTS #2019Calendar #London.”
One fan gushed: You are a work of art
Another praised: “Best body in the world.”
While a third added: “Wow fantastic x.”
Rhian is certainly not shy at flaunting her phenomenal figure and regularly posts jaw-dropping snaps to her Instagram account.
In a recent shot from her trip to Ibiza, Rhian oozed sex appeal wearing a smoking hot red one-piece but with the straps down.
Posing in the swimming pool, Rhian gazed into the distance as she gave her fans an impressive view of her generous cleavage.
Once again, the beauty was inundated with compliments with one fan writing: “Looking good, darling.”
Another added: “Red is definitely your colour,” while a third commented: “Hotness as per usual.”