Sources close to the situation tell TMZ ... Brian and Courtney are just friends who met about a month ago via social media. We're told the initial communication was about sharing ideas regarding the possibility of creating music together.
We're told after some friendly chats, they decided to meet up and hang out. And, they did ... hitting up a Mexican joint over the weekend in L.A.
It helps, we're told, they also share similar political views, the kind that makes them want to make a change that's bigger than themselves. For now ... it's platonic, but things could change. That's Hollywood, baby.