Alessandra de Osma's best wedding guest looks

Sassa de Osma, as she is also known, looked stunning at the wedding of Jean-Christophe Napoleón and Contess Olympia zu und von Arco-Zinnerberg, where she wore an Andrew Gn floral print midi dress ($3,080 at Net-a-Porter) featuring bishop sleeves and a teardrop neckline.

But if anything distinguishes the wife of Christian of Hanover, it's her choice of accessories. On this occasion, her heels by the Spanish brand Mascaró, her clutch, and the headpiece that added the finishing touch to her winning outfit, all stood out with their vibrant color.

For the wedding of Pierre Casiraghi and Beatrice Borromeo, Alessandra de Osma's choice of outfit transported us back to Hollywood's glamorous Golden Age: a glittering, long flowing dress featuring a V-neckline and an accentuated waist that gave form to this sensual, sophisticated look.

There is no doubt that the Andrew Gn label is one of her favorites. In fact, the dress she wore to the wedding of Princess Eugenie of York and Jack Brooksbank was one of his. It was the ideal look for this royal wedding, where, once again, Alessandra's choice of accessories perfectly complemented her overall look.

Alessandra de Osma is also a fan of affordable brands such as Zara and Uterqüe, the latter being the brand of the dress she wore to the wedding of María Vega-Penichet and Fernando Ramos de Lucas. She paired the gingham print shirt dress ($144) with a maxi headband, an accessory that brings personality to any outfit. Kate Middleton is a big fan of the fun headwear too.

The 31-year-old Princess is not afraid to let color and texture take center stage, like with this elegant puff-sleeve dress featuring an asymmetrical draped neckline, where the ornate pattern of the jacquard print really pops, bringing a sumptuous feel to the piece.

Flowers are a common theme in Alessandra de Osma’s closet, and one of her most striking pieces was her dress of choice for the wedding of her brother-in-law, Ernst August of Hanover and Ekaterina Malysheva: an eye-catching fuchsia midi dress featuring multi-colored embroidery by Termperley London accompanied by a pair of high heels by Altuzarra –also a favorite of Meghan Markle's – in the same tone.