The England hero and the blonde bombshell were all smiles off the coast of Ibiza.
Palmer was pictured relaxing on the back of a boat while looking at his phone.
He then joined the bikini-clad beauty as they enjoyed a dip in the sea together.
The pair rode the waves on a paddleboard and Palmer enjoyed a lie down as the mystery woman held the paddle.
After frolicking in the Mediterranean Sea, they hopped back on their luxury boat and dried off.
A red and white England speaker was spotted among his possessions on board.
It even appeared to have his Three Lions shirt number, 24, printed on it.
Palmer will soon be due back at Chelsea ahead of the new Premier League season.
The Blues kick-off their campaign on August 18 against his former club Manchester City.
But, for now, the 22-year-old midfielder is loving his well-deserved break.
Palmer had a stellar first season at Chelsea, scoring 22 league goals.
His performances saw him win the Premier League’s Young Player of the Year award and he was voted PFA Fans’ Player of the Year.
He then continued to impress for England at the Euros.
Palmer assisted Ollie Watkins’ dramatic semi-final winner and scored the brilliant equalising goal in the final.
But, despite the super sub’s heroics, the Three Lions fell short again as Spain went on to win 2-1.