Prince Harry spoke for the first time Thursday about his new nephew Prince George, telling reporters it is “fantastic to have another addition to the family.”

“I only hope my brother knows how expensive my babysitting charges are,” Harry quipped.

He touched briefly on his role as an uncle while visiting an exhibition in London documenting the work of his African-based charity, Sentebale.

“Make sure he has a good upbringing, keep him out of harm’s way, and make sure he has fun. The rest of it I’ll leave to the parents.”