Here´s an article about it all:
There's always one at every wedding - the embarrassing guest who
causes a scene.
Even, it appears, at the royal marriage of the decade.
According to Italian media reports, last weekend's wedding of Prince
Felipe and Princess Letizia of Spain ended in a punch-up which left
an Italian aristocrat nursing bruised lips.
Leaving a dinner given by King Juan Carlos and Queen Sofia on the
evening of their son's nuptials, the heir to the Italian throne,
Prince Vittorio Emanuele, was said to have hit his cousin and rival,
Duke Amedeo, on the steps of the Spanish royal residence.
One report said the Duke was twice punched in the mouth and would
have fallen to the ground had he not been caught by deposed Queen
Anne-Marie of Greece.
The daily, La Repubblica, said Duke Amedeo was then helped inside
the Zarzuela palace, where an unidentified Arab potentate applied an
ice pack to his bruised lips.
On learning of the affray, King Juan Carlos was said to have
stormed "Nunca más" (Never again) - apparently in reference to the
Italian's chances of a further invitation.
Duke Amedeo did not deny the attack. The newspaper La Stampa quoted
him as saying it was "an unpleasant business that does not deserve
further comment". The incident was the latest scandal in the life of
Prince Vittorio Emanuele, who returned to Italy last year after 57
years in exile.
In 1991, he was acquitted of manslaughter by a French court for an
incident 13 years earlier in which he fired a rifle from his yacht
off Corsica, fatally wounding a German tourist.
The prince renounced all claims to the throne as part of the deal
that allowed him back into Italy - a move that dismayed the
country's dwindling band of monarchists and prompted many to switch
their allegiance to Duke Amedeo.