Juan Carlos I, the king of Spain from 1975 to 2014, was believed to be amongst these in attendance whereas the Michelin-star chef, Quique Dacosta, was reportedly in command of catering.
"I was not invited and I did not expect it", Federer said on Sunday.
And the couple have since been inundated with messages of congratulations on social media. Like celebrating in a big way.
Federer had previously said he'd be busy preparing for the Swiss Indoors tournament in his home town of Basel while Nadal's wedding was taking place.
Guests were seen arriving to the fortress La Fortaleza.
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Perello stunned in a a haute couture wedding dress by Spanish fashion designer Rosa Clara, while Nadal looked suave in a grey suit coupled with black shoes.
Many of Nadal's tennis friends were also present including Carlos Moya, Feliciano Lopez and David Ferrer among others.
The 33-year-old Nadal ranks among the greatest tennis players to ever pick up a racquet.
He's won 19 Grand Slam singles titles - including the French Open a whopping 12 times.
In 2001, Nadal finished the year with a Challenger series record of 1-1 in singles with no titles or finals appearances.