Stefani shared the big news on Instagram with a snap showing her kissing the country music singer while holding her left hand up to the camera, showing off her new ring.
The couple began dating in 2015 after appearing on “The Voice” together as coaches in 2014. Theyve since appeared together on the singing competition several times. The duo have even released music together such as the song “Happy Anywhere.” Stefani and Shelton also duet on the tracks "Go Ahead And Break My Heart," "You Make It Feel Like Christmas" and "Nobody But You."
"It’s a special day for a special lady in my life," wrote Shelton in the caption. "Happy birthday @gwenstefani, I’d write a song for you every single day if I could..."