PRINCE William and Kate made a surprise appearance at Crown Prince of Jordan Hussein bin Abdullah’s glam wedding today.

The royal couple snuck in shortly before the ceremony to watch Jordan’s heir tie the knot with Saudi architect Rajwa Alseif, 29.

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They joined the star-studded crowd of spectators to celebrate the lavish nuptials in the Jordanian capital of Amman.

Members of other royal clans from Belgium, Spain, Denmark, the Netherlands and Japan also dusted off their hats for the wedding.

Prince William donned a dark suit and blue tie for the occasion, while Kate sported a long pink dress.

The pair were seen briefly greeting Jordan’s King Abdullah II and Queen Rania as they arrived at the Zahran Palace.

It is taking place at the Zahran Palace, the same venue chosen by the Crown Prince’s father, King Abdullah II, and his grandfather, the late King Hussein.

Crowds were gathering at huge screens set to livestream the wedding across the country.

Many attendees waving flags and decked out in the white-and-red checkered scarves that are a signature of Jordan’s ruling family, the Hashemites.