(L-R) Spain's Princess Letizia, Infanta Sofia, Infanta Leonor and their father Crown Prince Felipe arrive at school during the Infantas' first week of class in Aravaca, outside Madrid, in this September 14, 2012 file photo. REUTERS/Susana Vera/Files

Madrid - Spain's king-in-waiting Prince Felipe vowed Wednesday to work for a “united and diverse” nation in his first public remarks since King Juan Carlos announced his abdication.

While stressing his respect for Spain's parliament, which has yet to proclaim him monarch, the prince promised to devote all his strength to serving the Spanish people and “our dear Spain - a nation, a united and diverse social and political community that has its roots in a millennium-long history.”