The forty-two-year-old beauty was spotted buying an ice cream from a street seller in New York.
And whatever they were chatting about had the Kill Bill star in fits of giggles.
Uma is expecting her first child with her financier beau Arpad Busson.
She already has two children - ten-year-old son Levon and daughter Maya, 13, with her second husband Ethan Hawke.
The star was previously married to British Oscar nominee Gary Oldman.
Meanwhile Arpad is a daddy-of-two. He had Arpad Flynn Alexander Busson and Aurelius Cy Andrea Busson with former girlfriend, Australian model Elle Macpherson.
The French-born businessman has been dating Uma since 2007. They split briefly in 2009 but rekindled their relationship last year.