She swam it from Gozo to Malta last year to raise money for charity. Now the Prime Minister's wife is keen to do it again.
Michelle Muscat is planning another long swim, this time from Marsascala to the Grand Harbour, to raise funds for the Marigold Foundation.
The swim is scheduled for the 25 June, a glitzy video promoting the event and urging people to donate has revealed.
Mrs Muscat is the Marigold Foundation's chairperson. According to its website, the Foundation's objective is "to positively empower people and to work with them to raise standards, support initiatives and strengthen voices."