Blake Shelton is reportedly on the cusp of proposing marriage to girlfriend and fellow The Voice coach Gwen Stefani.

"Let me tell you something: it's coming. They had a moment," The Voice contestant Rose Short recently told Us Weekly.

Rose, who is a member of Gwen's team and just advanced to The Voice's Top 10 artists for Season 17 on Tuesday night, recalled a sweet behind-the-scenes moment she caught on The Voice set.

"We were backstage getting ready and she was getting her makeup done. He stopped and it was like -- so much going on that nobody saw it but me -- but he was standing there and he looked at her like he was so proud. So it's gonna happen," Rose shared.

"He's smitten by her. He's going to ask. He is in love with that lady. You could see it all over him."

Gwen, 50, and Blake, 43, first met each other years ago while filming The Voice, and what started out as a friendship blossomed into romance when the pair helped each other through devastating breakups.

Gwen filed for divorce from Bush singer Gavin Rossdale, who allegedly had a long-term affair with their children's nanny, right around the same time Blake was finalizing his divorce from country singer Miranda Lambert.

Gwen and Blake confirmed they're dating right after Halloween in 2015, once multiple photos surfaced of the couple engaging in PDA and spending a lot of time together.

The No Doubt frontwoman later finalized her divorce from Gavin in 2016. She and Gavin, however, share three sons together: Kingston, 13, Zuma, 11, and Apollo, 5.

The couple is reportedly still going strong after four years together, and they just bought a house together in October.

Engagement rumors swirled when Gwen was spotted wearing a diamond ring at the 2019 People's Choice Awards, but she clarified at the time it was not an engagement ring.

"It might be a real ring -- a real diamond -- but it's not a wedding ring, no," Gwen told E! News earlier this month. "When I have something to say, I'll say it."

Gwen and the country star currently star on Season 17 of The Voice as coaches, and both of them still have contestants in the race to win.
About The Author: Elizabeth Kwiatkowski
Elizabeth Kwiatkowski is Associate Editor of Reality TV World and has been covering the reality TV genre for more than a decade.