Lindsay Lohan

The OWN docu-series Lindsay ended its mostly lackluster season documenting Lindsay Lohan's life post-rehab with the actress opening up — and dropping a major bombshell. 

On Sunday's episode, the director asked the 27-year-old actress some final questions about her overall experience filming the show. Surprisingly, Lohan revealed that her struggle with filming mid-way through production was because she suffered a miscarriage. 

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"No one knows this, and we can finish after this. I had a miscarriage for the two weeks that I took off," she said. "It's a very long story. I was sick. And mentally that messes with you. And watching this series, I just know how I felt at that moment, and I can relate to that girl, which sounds kinda crazy. But I'm like, 'Oh my god, this is really sad, who is helping her?'" 

The Mean Girls star also talked about her leaked list of sex partners, which she first commented on during last week's Watch What Happens Live.

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"You know that list that came out, that was part of my Betty Ford — it's step No. 5 or step No. 8 — it's your sexual inventory, and that was in my Betty Ford book, so that was really personal to my sponsor. You write that for your sponsor," she said. "So someone took a photo [of the list], and I'm pretty sure I know who it is, unfortunately, and they're not a part of my life at all anymore... That's something sacred to me, that's something that I trusted with people that were in my life.  That's not something I'd show anyone, besides my sponsor, who is also a very well-known person. The fact that that happened was not only humiliating, but just mean." 

Watch the final moments of the series: