The couple was spotted having some fun on their jet skis together.
Holmes, 40, and Foxx, 51, have been in Miami this week as they get ready to celebrate the New Year together.
RadarOnline.com revealed that they are getting ready to get married in 2019.
The lovebirds enjoyed an adventurous day on Biscayne Bay aboard red and blue jet skis.
The previous day they were spotted kissing one another on a luxury boat as they celebrated with their friends.
Fun loving Katie appeared to cut across Jamie on her jet ski and splash him in the process.
While they enjoyed their romance her ex-husband Tom Cruise was having fun at Disney World in Orlando.
For more details on Katie and Jamie's fun packed vacay click through the images.
Katie is obviously feeling very confident these days after she was spotted wearing a Holmes a black bikini while enjoying the warm weather in Miami.
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at email@example.com, or call us at (866) ON-RADAR (667-2327) any time, day or night.
Foxx and Holmes have looked very happy in Miami as they have enjoyed some fun times on the ocean
The Former Dawson's Creek star was seen out ahead of her beau as the pair took in the sights on their jet skis.
Foxx and Holmes have gone public on their romance this year after they were spotted walking hand in hand in Malibu.
They have also been photographed with her mother Kathleen A. Stothers-Holmes showing that her family approves of the romance.
The couple's Florida fun comes after they recently celebrated her 40th birthday in New York.