King Felipe's sweet words to daughter Princess Leonor on her 18th

King Felipe of Spain had sweet words for his daughter Princess Leonor on her milestone 18th birthday.

Royal fans reminisce about moment King Felipe of Spain swore allegiance to the Spanish Constitution on his 18th birthday - as daughter Princess Leonor takes the same oath

The heir to the Spanish throne Princess Leonor is celebrating her 18th birthday

Spain's Princess Leonor Delivers Brave Speech in Barcelona

Leonor turns 18: What you need to know about Spain's crown princess

191,344 Congratulations Stock Photos, High-Res Pictures, and Images - Getty Images

Princess Leonor of Spain turns 18 and formally enters public life

Royal fans reminisce about moment King Felipe of Spain swore allegiance to the Spanish Constitution on his 18th birthday - as daughter Princess Leonor takes the same oath

King Felipe's sweet words to daughter Princess Leonor on her 18th birthday

Spain's Crown Princess Leonor turns 18 and is feted as the future queen

Can the Spanish royal family weather the Del Burgo bombshell? Queen Letizia's ex-lover alleges affair during her marriage to King Felipe

Royal fans reminisce about moment King Felipe of Spain swore allegiance to the Spanish Constitution on his 18th birthday - as daughter Princess Leonor takes the same oath

Queen Letizia 'had an affair after marrying King Felipe