Yes. But I said ONLY Royalty can be crowned in the Greek Wedding ceremony. Both Sophia & Juan Carlos (not Felipe) were royals. In an ordinary Greek wedding, no crowns were offered to the groom or bride.
A wedding traditions site says this:
On the day of the Greek wedding ceremony, the groom asks the bride's father for his daughter's hand in marriage. The groom's best man then accompanies the couple to the church, to be married. The best man, along with the priest, is in charge of the ceremony. He places gold crowns or wreathes made of orange blossoms on the heads of the bride and groom. These crowns or wreathes are linked by a silk ribbon. For the rest of their wedding day the newlyweds are honored as king and queen.
Another says this:
This is the focal point of the marriage ceremony. The crowns are signs of the glory and honor with which God crowns them during the sacrament. The wedding crowns (stefana) are joined by a ribbon which again symbolizes the unity of the couple and the presence of Christ who blesses and joins the couple and establishes them as the King and Queen of their home, which they will rule with wisdom, justice and integrity. The priest takes the two crowns and blesses The Bride and The Groom, in the name of the Father, and the Son, and of the Holy Spirit and then places the crowns on them. The Koumbaro then steps behind The Bride and The Groom and interchanges the crowns three times as a witness to the sealing of the union.
Here is an example:
