After teaming up for official engagements last week, William, Kate, and Harry will reportedly be the star trio at the social event of September, Royal Watch can reveal. The Cambridges and Prince Harry have been invited to their good friend Charlie Gilkes's wedding in Italy, and they are planning to celebrate in style.

The royals have always been known to love weddings-any excuse to don their fancy top hats and tails!

The upcoming wedding will be in Italy and is set to be quite an event, even though plans for the party are currently shrouded in secrecy.

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The groom, Charlie Gilkes is an alum of Eton with more than a decade's exprience running nightclubs and launching restaurants, including Mr Fogg's and Bunga Bunga in London. He certainly knows how to throw a good bash. I'm told his gorgeous P.R. fiancée Anneke von Trotha Taylor is overseeing the V.I.P. guestlist.

"The [Cambridges] are really looking forward to it and William and Kate are planning to leave Prince George with Kate's parents so they can go and have a good time," a chum of theirs tells me. Gilkes is also a former flame of Pippa Middleton's, and is reported to have popped the question to von Trotha Taylor, his girlfriend of three years, using a message inside a specially crafted fortune cookie, which he gave to Taylor while the pair were holidaying at the five-star Torre Maizza hotel in Puglia, Italy last month.

Wedding plans are now in full swing. Royal Watch will keep you posted.

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