8:55 AM PT -- A rep for Dakota Johnson confirmed to TMZ that the couple is still very much together and happy.

Dakota Johnson and her fiancé Chris Martin's romance has tanked ... they're reportedly packing it in after 7 years of dating.

The Daily Mail broke the story and claims irreconcilable work schedules caused the split.

The news comes as a shock ... especially since they seemed all googly-eyed during their Mexico getaway earlier this year, right before their engagement became public in March.

Rumor had it Chris might’ve popped the question as far back as 2020.

Chris’ ex, Gwyneth Paltrow, was all in for the couple tying the knot ... and was totally cool with Dakota playing stepmom to her and Chris' 2 kids, Apple, 20, and Moses, 18 -- but looks like family dynamics will now take a serious turn.

Chris and Dakota first got together in 2017, had a brief split in 2019 ... but after all these years, it seems their story didn’t quite hit the picture-perfect ending.