Find Out Who Has Already RSVP’d for George Clooney and Amal Alamuddin’s Wedding

Miguel Ferrer (left) and George Clooney

Gregg DeGuire/WireImage

updated 06/12/2014 AT 2:00 PM ET

originally published 06/16/2014 AT 10:00 AM ET

At least one guest has already RSVP’d “yes” for the upcoming wedding of George Clooney and Amal Alamuddin.

Clooney’s first cousin, NCIS: Los Angeles actor Miguel Ferrer, says he plans to attend the nuptials.

“I don’t know if I can tell you a lot about this marriage,” Ferrer, 59, told France’s Tele Star magazine during the Monte Carlo Television Festival, which wrapped in Monaco yesterday.

But, he added, “Obviously I’ll be there!”

A source close to Alamuddin’s family told PEOPLE last month that the couple plan to tie the knot in Italy in September.

Ferrer is the oldest of five children of Oscar-winning actor José Ferrer and famed singer Rosemary Clooney. Rosemary’s brother, Nick, is George’s father.

Although he was tight-lipped about details of the big day, Ferrer did open up a little about his cousin’s new fiancée.

“At first the family was surprised to learn the happy [engagement] news,” he said, adding that since the proposal he has come to know the British lawyer as “a wonderful woman.”

Inside Scoop: George Clooney Gets Engaged!

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