The American artist and actor will play Maurizio Gucci's ex-wife Patrizia Reggiani, who was convicted of lying behind the murder of her ex-husband, who served 18 years in prison before being released in 2006.

Maurizio Gucci, who was the grandson of Gucci's founder Guccio Gucci, was shot dead in 1995 by a hired torpedo.

The role will be Lady Gaga's first after the movie A star is born, which gave her an Oscar figurine for best original song and a nomination for best female lead role.