Adam Levine and Behati Prinsloo are good pals with Blake Shelton and Gwen Stefani.

This would make sense considering that Levine is a judge on The Voice along with Shelton and Stefani. But when the No Doubt singer posted a selfie on Instagram on Thursday, it's pretty clear that Levine's wife is part of the gang since the group posed together for a buddy snapshot.

 @behatiprinsloo @adamlevine @blakeshelton

A photo posted by Gwen Stefani (@gwenstefani) on May 11, 2016 at 5:48pm PDT

With these two couples spending time together, it looks like there's a strong connection happening all around. In fact, there's a rumor going around saying Shelton might be the godparent of Levine and Prinsloo's future child.

"Blake has already volunteered to be the godfather, so he can show their little one the ropes," a source told Hollywood Life.

Prinsloo is expected to give birth sometime this fall. Before that happens, Shelton and Stefani might be throwing a fun party for their friends as they expect their first child.

"Blake said he wants to throw a baby shower with Gwen," the source revealed. "He was half-joking, but he seems like he wants to be involved and be there for Adam, all jokes aside."

In a previous report from Entertainment Tonight, Shelton explained why he's stoked to see his pal learn what it's like to be a father.

"I'm looking forward to Adam actually having to wake up before noon or one o'clock for the first time in his life, you know, to go change a diaper," he joked. "I think it's going to be good for him. I think the baby is going to do more for Adam than Adam is going to do for the baby, I'll put it to you that way. I'm very happy for him."

Tags: Adam Levine behati prinsloo Blake Shelton Gwen Stefani