"I think marriage is wonderfully complicated and wonderfully interesting, and everybody conducts their marriage differently," she continued. "We know almost nothing about people's marriage, because even those who we're most intimate with in friendships, we don't always share the good or the bad. And I just think that at a certain point, some people feel alone and lost."
Parker explained that since marriage and divorce mean different things to different people, she's interested in creating "a portrait of divorce."
"I think we're at an age where a lot of people have experienced it, or are about to, or want to, or secretly wish they could, or [are] so grateful that their marriage isn't at that state," Parker said. "And so I love the idea of telling that story."
Divorce also stars Thomas Haden Church, Molly Shannon, Talia Balsam and Tracy Letts.
Other original HBO programs getting a fall debut include the star-studded sci-fi drama, Westworld, as well as half-hour comedies, Insecure and High Maintenance.
To find out more about Divorce, watch ET’s exclusive sit-down interview with Parker below.