The Grand Ducal Family was out in force at the annual Luxembourg International Military Tattoo. The Grand Ducal Couple was present. Prince Louis was all smiles as he and his wife made the rounds. Tessy looked very nice in a causal suit and darker hair (no more blonde highlights please).
It's not mentioned on the official website but Prince Guillaume and the always lovely Princess Sibilla also attended. They were accompanied by two of their children.
RTL has a gallery containing more than 700 photos.