The stars stayed close during their night out in Nashville
Following months of relationship speculation, Shelton, 39, and Stefani, 46, made their first appearance as a couple at a CMA Awards afterparty.
“They were very comfortable with each other,” says a source.
The duo sported casual looks, with Stefani pairing jeans with a black top and jacket and Shelton wearing a dark button-down shirt and jeans.
While balancing drinks, Stefani and Shelton held hands and walked with pals outside.
Hours earlier, a source confirmed to PEOPLE that the fellow Voice coaches "have begun dating."
The insider added, “They’ve been supporting each other through a difficult time and they’re really happy together.”
Stefani and Shelton touched down in Tennessee Tuesday on the same flight, a source told PEOPLE.
Romance rumors gained steam after they were spotted leaving Jared Leto’s Halloween party in Los Angeles.