How soon did marriage come up in your relationship?

Out of curiosity, how far into your relationship did you and your SO start talking about engagement/marriage stuff?

I (31F) have been dating my bf (27M) for 6 months now, and it has started coming up recently. It has been mentioned that we wouldn’t actually be doing any wedding stuff for another 2 years because I want to be done with school first (and he agreed to that), but lately it seems like it has been on both of our minds. It does not feel like there is pressure on either of us, I don’t feel weird about it, just wondering how normal it is at our stage of relationship.