Gwen Stefani sent the sweetest birthday wishes to her boyfriend, country singer Blake Shelton, who celebrated his 43rd on Tuesday.
"Happy b day to my favorite human!!! Can’t believe your mine ❤️🤷♀️ #soooooolucky!!!!" she captioned a post featuring snaps of Shelton.
The singer, 49, added the hashtag "#greatestguyiknow," to the post.
The two music stars have reportedly been dating since 2015.
Stefani also included a video of Shelton getting acquainted with a friendly sea lion at a visit to a Chicago aquarium.
"Thank u shedd aquarium Chicago for an amazing unexpected b day tour!!!" she added in the caption of the post.
Stefani spoke about her close relationship with Shelton to "Good Morning America" in June 2018.
"He's my homeboy. He's my homey. He's just really an amazing all-around human so I feel so grateful for that," she said.
"I celebrate him in the show!" she said of her "Just A Girl" Las Vegas residency. "He's inspired me so much. He's changed my life."
Stefani's Vegas residency runs until November.