updated 08/31/2012 AT 2:00 PM ET
•originally published 08/31/2012 AT 5:00 PM ET
Local reports said they made a low-key arrival in an SUV before boarding a boat to wend their way through the city on the water.
Last week, the duo, whose one-year anniversary together is coming up, got an early start on the Gossip Girl’s 25th birthday with a sweet celebration at Manhattan’s Serendipity 3 restaurant.
Prior to that, they were spotted at the gym together.