The shocking news comes just four months after Casiraghi, 32, gave birth to 37-year-old film producer Rassam’s son.
According to reports, the two longtime friends had reconnected at the end of 2016 and got engaged just last March while on a ski getaway together.
People reported the pair had been “talking dates” — including this spring — for their now-cancelled wedding, which was supposed to take place in Italy.
Besides her newborn baby with Rassam, Casiraghi is also mom to a 5-year-old boy, Raphaël, who she had with comedian Gad Elmaleh.
Rassam has a 7-year-old daughter, Darya, from his former marriage to the Russian model Masha Novoselova.
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