Prince Albert wasn’t the only Monaguesque royal who enjoyed the opening day of the Tour de France. His nephews Andrea and Pierre Casiraghi joined in the festivities as well.

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Andrea Casiraghi talking business on his cellphone

The Casiraghi brothers were quite a contrast last weekend. Andrea was business-like in a suit, while Pierre appeared super casual in a T-shirt, shorts and loafers.

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Andrea Casiraghi at the Tour de France opening day

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Pierre Casiraghi taking it easy at the start of the Tour de France on July 4, 2009

Image: Bauer-Griffin