Robert Downey Jr. and dad have lunch in New York

It was father-son day in the Big Apple for the Robert Downeys.

In town promoting "Iron Man 3," Robert Downey Jr. had a lighthearted lunch with papa Robert Downey Sr. at Park Avenue Spring this week.

"Spirits were high and they were joking around throughout lunch," a spy dished.

The pair, who had security in tow, ordered skirt steak and salads.