Although the Goop founder was married to the Coldplay frontman for 11 years before announcing their split, she now admits that the pair “didn’t quite fit together.”

“We were close, though we had never fully settled into being a couple,” Paltrow, 47, wrote in an essay for Vogue UK published on Thursday. “We just didn’t quite fit together. There was always a bit of unease and unrest. But man, did we love our children.”

The “Iron Man” star and Martin, 43, share 16-year-old daughter Apple and 14-year-old son Moses.

Paltrow shared that she accepted that “unrelenting trickle of truth” while on a trip to the Tuscan countryside with Martin for her 38th birthday.

“Between the day that I knew and the day we finally relented to the truth, we tried everything,” she wrote. “We did not want to fail. We didn’t want to let anyone down. We desperately didn’t want to hurt our children. We didn’t want to lose our family.”

The “Shakespeare in Love” star said she parlayed the different ways in which she and Martin could co-parent, asking herself, “Could my ex continue to be a family member, someone who would continue to protect me, want the best for me? Could I be that for him?”

The response came in the form of the now-infamous term “conscious uncoupling,” which she and Martin used in their separation announcement.

“It was an idea introduced to us by our therapist, the man who helped us architect our new future,” Paltrow said. “I was intrigued, less by the phrase, but by the sentiment. Was there a world where we could break up and not lose everything? Could we be a family, even though we were not a couple? We decided to try.”

The actress added that she and her ex were able to have an amicable split because she owned her own mistakes.

“It’s very different for every couple but, for me, it meant, more than anything, being accountable for my own part in the dissolution of the relationship,” she said. “There existed aspects of myself I was trying to heal through this relationship that I wasn’t honest with myself about. I had been blind, guarded, invulnerable, intolerant. I had to admit that and be brave enough to share it.”