CBS News/ July 5, 2012, 2:43 PM

Royal bachelor pool shrinks with Andrea Casiraghi's engagement

Andrea Casiraghi attends the launch of collection by Repossi on Oct. 7, 2009, in Paris.

/ Getty

(CBS News) The eligible royal bachelor pool just got a bit smaller.

On Wednesday, Monaco's Princess Caroline announced that her son, Andrea Casiraghi, will marry Colombian heiress Tatiana Santo Domingo. And he's just the latest in a string of recent royal bridegrooms and bridegrooms-to-be.

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Casiraghi is the nephew of Monaco's ruling sovereign, Prince Albert II. Albert himself, the son of late movie star Grace Kelly, ended decades of bachelorhood in 2011 when he wed South African Olympic swimming champion Charlene Wittstock.

Casiraghi isn't the only royal with plans to take a trip down the aisle. In May, the Grand Ducal Palace of Luxembourg announced that Hereditary Grand Duke Guillaume would wed his fiancee, Countess Stephanie de Lannoy, on Oct. 20.

Both Casiraghi and Grand Duke Guillaume were chosen among the most beautiful royals in the world in a 2011 poll.

And last year, Prince William, also on that beautiful royals list, wed Kate Middleton, now the Duchess of Cambridge. His little brother, Prince Harry, is still available. Recent reports suggested Harry was dating British pop star Mollie King but when asked if they were an item, King laughed, telling BBC News, "No, no."

There are still other royal bachelors available, including Casiraghi's brother Pierre, Prince Carl Philip of Sweden, Prince Felix of Luxembourg and Prince Philippos of Greece, to name a few.