A rift between the two started when Remini name dropped Jada and her husband Will Smith in her 2015 book, "Troublemaker: Surviving Hollywood and Scientology," claiming they all attended a party at Tom Cruise's house where they played hide-and-seek. She later claimed Jada was a Scientologist.
"We haven't talked in years," Smith said at the top of her Facebook Watch show. Jada went on to explain that there has been confusion over her involvement in the church, after she became interested in Study Tech and used some of the controversial group's teachings at one of her schools.
Before Remini joined his wife for a very candid chat, Will actually chimed in, saying he believes Remini only spoke out about them because "whatever she experienced with the Church of Scientology hurt her bad and hurt people hurt people." He added, "She took a shot at us out of pain. She was hurt and she started taking shots at us."
After explaining how mutual friend Duane Martin urged them to have a conversation with each other after all these years, Jada explained to Leah why she was "hurt" by the book.
"It upset me because I didn't understand why we had to be in your book, we didn't really have anything to do with this," she said.
"I wasn't even considering that you would be hurt. I literally, looking back on it, I wasn't even considering Jada and Will," Remini said, apologizing. "I'm sorry that I didn't consider you, because I didn't. I was so caught up in that pain and also the pain of others and the affects that it had."
Jada was eventually asked about the book while appearing on "Watch What Happens Live," where she tried to downplay the situation. Remini said she was "floored" by the appearance, saying it only reinforced her belief that Jada was now a member of the church.
"Wow, Jada, not only is she in Scientology, but they sent Jada out," she remembered thinking.
"He doesn't tell you what he's going to talk about, he throws stuff at you," Smith said of host Andy Cohen. "When it came out, it's like, that's not how I remember that night going. My producer told me that you felt like I wasn't supportive of you and I just want you to know, you had basically created a situation for Will and I. At that point, I'm like, I gotta protect Will and I."
While Smith was only trying to do what she thought was best for herself and her husband, Remini believed the church was using Jada to discredit her.
"Scientology has policies called fair game and that's to discredit and attack anyone who's speaking out against the abuses of Scientology," alleged Remini. "When I saw it, I was hurt, like, she's in, she's fair gaming me. Fair game is a policy in Scientology that calls for the utter destruction of a critic of Scientology. You get trained on how to do this. You first deal with it with a laugh and the second thing is to discredit the facts."
While Leah called Jada's comments "textbook" fair gaming, Smith insisted that's not what she was doing.
"I want to acknowledge that I hurt your feelings and that's the last thing I want to do," Smith told her guest. "I don't get any joy out of hurting people. When I saw that you made that statement, I was like, I felt the need to respond to something I felt was untrue and was an attack."
Jada then chalked it all up to being a "big ass misunderstanding," explaining that she's not a Scientologist, but someone who's instead very interested in all religions. Smith said she prides herself as being someone who could "hold my own" but still be "amongst that group of Scientologists."
"You were allowed to do that because of who you are and who your husband is," Remini told her. "You were seeing a side of me that wasn't 100% authentic, because my job was to always be a perfect person in front of you or any celebrity to solely get you into Scientology, fully indoctrinated, fully on board and deserting any other beliefs or system of learning."
They then talked about being guests at Tom Cruise and Katie Holmes' 2006 wedding, an event Remini was very uncomfortable attending.
"I'm not really excited about sitting down to a 20 course meal, but I can't say any of that," she reacalled. "If I said anything critical, I would have gotten my ass handed to me had I been critical of anything that was happening at that wedding. And I have people listening to everything I'm saying."
She said she was sent to Florida for "interrogation for three months" after the event, after she allegedly asked about the whereabouts of Shelly Miscavige, the wife of Scientology leader David Miscavige.
"I do remember when I got home and all of that was happening, I was like, you know what, good for Leah," Jada said. "Where is your friend, where is she? I had a lot of respect for the fact that you would not give up on that question."
"It's still not answered today," alleged Remini. "We are still being stonewalled today."
Looking back at their feud and taking this new intel into account, Jada said she could "totally understand how we got into that clash."
"I should have thought about the names in the book, I should have thought about what that meant to you and I didn't," added Remini.
The Church of Scientology has previously denied all assertions made by Leah Remini regarding the organization and David Miscavige.