Katie Holmes turns heads in tiny black bikini on mega yacht with boyfriend Jamie Foxx

They are known for keeping their romance private.

But all eyes were on Katie Holmes on Friday as she was spotted lounging on a mega yacht with Jamie Foxx.

The 40-year-old actress made jaws drop while donning a tiny black bikini as she enjoyed an overcast day on the water in Miami.

Stunning: Katie Holmes had all eyes on her Friday as she was spotted on a mega yacht with Jamie Foxx

Holmes is known for her sartorial sensibilities on and off the red carpet, but it was her lack of clothing and incredible physique that grabbed onlookers’ attention.

The teensy two-piece highlighted the Batman Begins star’s flat stomach and shapely behind as she went about what looked to be a relaxing and romantic grey sky day.

She pulled her brunette locks into a messy bun and at times was seen wearing a colorful pink frock on top.

The playful dress looked light, made for boat getaways, and features orange, pink, and purple flowers.

Jamie opted for a casual look himself, donning a white t-shirt as he sat next to his love. 

On the dock: The 40-year-old actress left eyes bulging stunned in a tiny black bikini as she enjoyed an overcast day on the water in Miami

On the dock: The 40-year-old actress left eyes bulging stunned in a tiny black bikini as she enjoyed an overcast day on the water in Miami

Flawless: Holmes is known for her sartorial sensibilities on and off the red carpet, but it was her lack of clothing and incredible physique that grabbed onlookers' attention

Beauty: The teensy two-piece highlighted the Batman Begins star's flat stomach and shapely behind as she went about what looked to be a relaxing and romantic grey sky day

Flawless: Holmes is known for her sartorial sensibilities on and off the red carpet, but it was her lack of clothing and incredible physique that grabbed onlookers’ attention

Catching up: She pulled her brunette locks into a messy bun and at times was seen wearing a colorful pink frock on top

Catching up: She pulled her brunette locks into a messy bun and at times was seen wearing a colorful pink frock on top

Pretty in pink: The playful dress looked light, made for boat getaways, and features orange, pink, and purple flowers

Pretty in pink: The playful dress looked light, made for boat getaways, and features orange, pink, and purple flowers

Date: Jamie opted for a casual look himself, donning a white t-shirt as he sat next to his love

Date: Jamie opted for a casual look himself, donning a white t-shirt as he sat next to his love

Katie recently returned from New Orleans where she was filming her latest movie, The Secret based on the iconic self-help book by Rhonda Byrne.

While there, the couple stepped away from their usual opposite coast-relationship and shared a house together.

And rumor has it that the two are busy planning a Paris wedding.

Warming up: The couple were spotted hanging out and enjoying the views despite the overcast weather

Warming up: The couple were spotted hanging out and enjoying the views despite the overcast weather

Vacation: Katie recently returned from New Orleans where she was filming her latest movie, The Secret based on the iconic self-help book by Rhonda Byrne

Vacation: Katie recently returned from New Orleans where she was filming her latest movie, The Secret based on the iconic self-help book by Rhonda Byrne

Changing it up: While there, the couple stepped away from their usual opposite coast-relationship and shared a house together

Changing it up: While there, the couple stepped away from their usual opposite coast-relationship and shared a house together

Katie recently returned from New Orleans where she was filming her latest movie, The Secret based on the iconic self-help book by Rhonda Byrne.

While there, the couple settepped away from their usual opposite coast-relationship and shared a house together.

And rumor has it that the two are busy planning a Paris wedding.

Wedding bells? And rumor has it that the two are busy planning a Paris wedding

Wedding bells? And rumor has it that the two are busy planning a Paris wedding

According to Radar Online, the couple are planning to tie the knot next year.

‘Paris is the city where they decided to go public with their romance after years of sneaking around,’ a source told the media outlet.

‘Jamie’s been a handful ever since they started secretly dating in 2013 — but Katie’s convinced him to settle down, and they’re ready to make it official.’

Reading: According to Radar Online , the couple are planning to tie the knot next year

Reading: According to Radar Online , the couple are planning to tie the knot next year

That's a big boat: 'Paris is the city where they decided to go public with their romance after years of sneaking around,' a source told the media outlet

That’s a big boat: ‘Paris is the city where they decided to go public with their romance after years of sneaking around,’ a source told the media outlet

By the bay: 'Jamie's been a handful ever since they started secretly dating in 2013 — but Katie's convinced him to settle down, and they're ready to make it official.'

By the bay: ‘Jamie’s been a handful ever since they started secretly dating in 2013 — but Katie’s convinced him to settle down, and they’re ready to make it official.’

Harbor: Katie, who split from Cruise back in 2012, is aiming for a winter wedding

Harbor: Katie, who split from Cruise back in 2012, is aiming for a winter wedding

Katie, who split from Cruise back in 2012, is aiming for a winter wedding.

And after the couple say ‘I do,’ Foxx has ever intention of adopting Holmes’ daughter Suri, age 12.

‘Jamie will adopt Suri when the time is right, but not before they’ve said their vows,’ the insider claimed. ‘They know it won’t go down well with Tom, but it’s what he and Katie want — and also what Suri wants.’

Coming up: And after the couple say 'I do,' Foxx has ever intention of adopting Holmes' daughter Suri, age 12

Coming up: And after the couple say ‘I do,’ Foxx has ever intention of adopting Holmes’ daughter Suri, age 12

Currents: 'Jamie will adopt Suri when the time is right, but not before they've said their vows,' the insider claimed. 'They know it won't go down well with Tom, but it's what he and Katie want — and also what Suri wants'

Currents: ‘Jamie will adopt Suri when the time is right, but not before they’ve said their vows,’ the insider claimed. ‘They know it won’t go down well with Tom, but it’s what he and Katie want — and also what Suri wants’

Getting ready: Jamie was spotted wearing a black t-shirt and grey shorts as he headed to the boat

Getting ready: Jamie was spotted wearing a black t-shirt and grey shorts as he headed to the boat

Shades on: He shaded his eyes with black-framed lenses and had a stern look on his face while heading in

Shades on: He shaded his eyes with black-framed lenses and had a stern look on his face while heading in

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