Conor McGregor trained with the Princess of Monaco on Wednesday as he prepares to take on a gruelling 180km challenge.
The Notorious is set to swap the Octagon for the sea when he takes part in a Marathon Endurance Race across the Mediterranean next month.
The water biking contest begins in Corsica on September 12 and finishes at Monaco's Yacht Club the following day.
Sharing training pictures on his Instagram account, McGregor commented: "Another day closer to #TheCrossing!
"Great work today with her highness Princess Charlene of Monaco!
"Training between the elements of night and day to prepare for our 180km voyage from Corsica to Monaco by sea bike. We are estimating upwards of 30 hours for completion. This September 12th!
"We are ready!"
McGregor revealed his participation in the race a few weeks ago, saying: "Joining Princess Charlene’s team for the Marathon Endurance Race is both an honor and a challenge. When I commit, I always train hard, and we plan to win!
"The Princess’ foundation works in over 30 countries promoting fitness and safety in water sports.
"I appreciate the support and encouragement I have received in Monaco. Let’s go team @mcgregorfast!"
Princess Charlene is both the event's chief organiser and the defending team champion and trained with McGregor when they met last month.
Welcoming McGregor to her team, she said: "@thenotoriousmma welcome to the team ,so happy to have you on board with this challenge.
"Was great meeting and training with you!"
