The end of summer picnic, or the 'U Cavagnëtu', is a Monagasque-style picnic open to all in Monaco’s Princess Antoinette park. It has also become a benchmark occasion for royal watchers.
A resident told PEOPLE, 'They’ve grown so much over the summer.
'What’s truly amazing, really special, to see is how attached they are to one another. How attentive Princess Gabriella is to her brother.'