Lauren Sanchez flaunts her cleavage and gives subtle nod to fiancé Jeff Bezos in sports bra

Lauren Sanchez has put her ample assets on full display as she stunned in a plunging sports bra while donning a necklace inspired by her fiancé, Jeff Bezos .

The 54-year-old businesswoman - who is engaged to the 60-year-old billionaire Amazon founder - was spotted having a girls day with pal and entrepreneur Tina Chen Craig.

The close friends posed up a storm in a series of selfies, which were posted on Tina's Instagram Story .

Lauren - who has been promoting her new children's book - stunned as she opted for a casual look, wearing a matching Alo Yoga set with a figure-enhancing sports bra and leggings.

In addition to flaunting her cleavage, the former journalist also showcased her love for Jeff as she sported a diamond letter 'B' necklace - a nod to her soon-to-be status of being Mrs. Bezos.

In the first snap shared to Tina's Instagram Story, Lauren and the beauty businesswoman grinned from ear-to-ear as they snapped the selfie.

The 54-year-old wore a brown sports bra and a pair of matching leggings, which retails for a total of $200.

She threw her hair up in a ponytail and put a baseball cap on as she made sure all the attention was on her eye-catching gold 'B' necklace.

Lauren paired her casual look with a white jacket, which she kept unzipped and a pair of Aviator sunglasses as she threw up a peace sign.

Meanwhile, Tina donned an all-black outfit as well as a black baseball cap.

She captioned the snap: 'Always the most fun with you!'

The pair also posed for another photo, in which Lauren decided to opt for a more modest look as she zipped up her jacket.

Lauren's necklace is just one of the many ways the former journalist has paraded her love for the Amazon founder as she isn't shy when it comes to showcasing her admiration for her fiancé.

The brunette beauty has previously soaked up the sun in a number of stunning looks while on her billionaire fiancé's $500 million yacht.

The loved-up couple spent their summer enjoying a relaxing and romantic getaway in Greece alongside the brunette beauty's ex-boyfriend, Tony Gonzalez; his wife, October , and a few of their other pals - including Kim Kardashian .

And, the future Mrs. Bezos, 54, made sure to show off her sizzling physique while on the lavish vacations.

In the past, the mom-of-three has also gushed about the moment Jeff got down on one knee.

Lauren detailed the heartwarming moment Jeff got down on one knee while speaking to Vogue last year.

She recalled how Jeff popped the question on the $500 million superyacht after they enjoyed a romantic dinner under the stars together.

Lauren said Jeff concealed the huge diamond ring under her pillow, adding that she almost 'blacked out' when she discovered it at the end of their romantic evening.

The couple recently relocated from Seattle, Washington, to Indian Creek Island in Florida - with Jeff purchasing three mansions on the island, totaling a whopping $237 million.