Robert Kamau/GC Images TheStewartofNY/GC Images Lake Bell and Chris Rock
The couple was photographed walking arm-in-arm in New York City's SoHo neighborhood, after returning to U.S. soil following their vacation in Croatia.
Bell, 43, and Rock, 57, each held a drink in their opposite hands as they walked together on Sunday, with the actress/director in a patterned skirt and top and blue slides. Her actor-comedian beau wore a dark-blue T-shirt, Adidas pants and white sneakers.
Also that day, the duo was spotted stepping out in Manhattan with Bell in the same skirt paired with a white top and black combat boots. Rock swapped out his athletic bottoms for green cargo pants, also wearing a white T-shirt, baseball cap and black backpack slung over one shoulder.
"Chris has a busy work schedule right now," a source tells PEOPLE. "Lake joins him on tour when she can. They are making it work. They seem happy. Chris is very attentive and seems to really like spending time with her."
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Robert Kamau/GC Images Lake Bell and Chris Rock
Rock and Bell first sparked dating rumors in June, when they were spotted together for the first time at a St. Louis Cardinals game.
Earlier this month, a source confirmed to PEOPLE that the pair "have been seeing each other for a few weeks," and added, "They are getting to know each other and seem to have fun."
Confirmation about Bell and Rock's relationship came days after the actors were seen multiple times together in Santa Monica, California, including outside restaurant Giorgio Baldi, over Fourth of July weekend.
A source at the Italian eatery told PEOPLE that the two "had a late dinner date" that "looked romantic," adding, "Not too much PDA, but you could tell from the smiles and laughter that they had fun."
Grgo Jelavic/PIXSELL / SplashNews.com Chris Rock and Lake Bell
Days later, they were spotted on a yacht off the coast of the European country, where Rock chatted with Sacha Baron Cohen. In another image, Bell, wearing a purple mini dress, held onto the ship's rails, smiling as she looked out to sea.
"I can't say how serious this romance is or what it will become because it is way too early. But they create a storm of laughter when together and both are real people. It's a good match," a source told PEOPLE this month. "Chris is busy and happy, and his time with Lake Bell has been great."
"They share a giant sense of humor and a way of looking at life with sarcasm and outrage, which gives them lots to laugh about," the insider also said.