Kate & Chris Reunite... For a Little Bit

Kate Hudson reunites with ex-husband Chris Robinson, 40, to take their son Ryder Russell, 3 1/2, for a walk on Thursday in the West Village.

Despite the cold in New York, the family looked bundled up and ready to have some fun!

Hudson, 28, will star opposite Anne Hathaway in the romantic comedy Bride Wars. The pair will play best friends whose relationship takes a tumble when they set the same date for their weddings. They end up competing for venues, services and guests causing mayhem for everyone involved. The film is due out sometime in 2009.