Duchess of York Sarah Ferguson hit town on Monday for her daughter Princess Eugenie’s 25th birthday.

Fergie, Eugenie and her royal sibling Princess Beatrice were seen at Fresco by Scotto having lunch after Fergie landed from London.

“It was very celebratory,” said a spy, adding that the meal was topped off with a sundae to share as their “bodyguards lingered close by.”

Eugenie’s been working in New York at online auction house Paddle8, while Beatrice just relocated here from London to take a finance course. A spy reports Ferguson was heard saying they were all “back in New York to live for a while,” indicating she’ll stay put, too.

The royal celebration continued later at Butter with five more guests joining them for dinner.