Overview

• Guillaume, 43, took the constitutional oath before the Chamber of Deputies after his father formally signed abdication papers at the Grand Ducal Palace.
• Representatives of the Dutch and Belgian royal families attended, with Emmanuel Macron and Frank‑Walter Steinmeier expected at a gala dinner in Luxembourg City.
• Pope Leo XIV sent a congratulatory telegram conveying his Apostolic Blessing to the new sovereign and the people of Luxembourg.
• The new grand ducal couple greeted crowds from the palace balcony, with a nationwide tour to follow through the weekend and a concluding Sunday Mass led by Cardinal Jean‑Claude Hollerich.
• Officials and commentators expect continuity in the head of state’s constrained powers, coupled with a potentially warmer, more personal public approach.