Shelton, 39, asked his girlfriend, 46, to serve as the mentor for his team when The Voice returns with its tenth season February 29 at 8PM ET/PT on NBC, Us Weeklyreported.
Stefani will reportedly mentor Shelton's team of contestants during The Voice's famous "Battle Round."
Christina Aguilera will be taking Stefani's place on the regular panel of coaches. Due to other career responsibilities and personal commitments, the two icons have been switching on and off with Shakira in the mix as well.
"I don't want Gwen to not be on the show, like, why can't we have a fifth coach?" Shelton told Extra last month as he had a sad expression on his face.
When asked whyThe Voice can't have two females starring on the show, Shelton quipped, "Why can't we?! I vote for that!"
Earlier this week, Shelton had Stefani on his arm when they attended his hairstylist Amanda Craig's wedding together in Nashville, TN.
"Gwen and Blake were kissing and slow dancing most of the night," a source told Us of the couple at the reception. "Blake was looking at Gwen like she was the only woman in the world!"
Ironically, Stefani reportedly caught the bride's bouquet, a tradition which means Stefani will be the next girl getting married.
"She was smiley and super cute about it," the source added. "Blake came up and gave her a kiss."
After the wedding, Stefani and Shelton stayed in his multimillion-dollar luxury tour bus instead of a hotel. They reportedly parked right outside the venue.
Stefani's ex-husband Gavin Rossdale is allegedly bothered by the No Doubt singer's constant PDA with Shelton. The duo are all over each other in public and seemingly couldn't be happier.
"Seeing Gwen so crazy in love is killing him," an insider told the magazine. "He had hope that they would get back together, but knows there‚Äôs no chance of that now."