The agenda of The Grand Ducal Family confirms that The Grand Ducal Couple and The Hereditary Grand Duke will attend the wedding celebrations of The Prince of Monaco and Miss Charlene Wittstock. During RTL's National Day coverage it was already confirmed that The Hereditary Grand Duke would attend.
The wedding will take place this Friday and Saturday in Monaco. It should be noted that the agenda only confirms their attendance for the celebrations on Saturday. It specifically confirms their attendance at the religious wedding. No mention is made of Friday's civil ceremony or the other events scheduled during the two day celebration.
Source: Cour Grand-Ducale