The two actors, who previously worked together in the 2011 movie, The Help, are reuniting in an upcoming holiday comedy produced by Chastain.
"I have a story, and you guys are gonna be the first to hear it", Spencer said to the crowd at a "Women Breaking Barriers" panel.
It comes after Jessica revealed her pride that, in an era where politics is becoming more "conservative and intolerant", the movie industry is trying to be more diverse and pushing for gender equality.
"I can only hope that with all the attractive alliances made as of late in the entertainment industry that women of color can lean on our courageous and compassionate white sisters to flow us their support and power to create more equality in this area as we move forward", she wrote on Twitter. "So, if we're gonna have that conversation about pay equity, we gotta bring the women of color to the table, '" she told attendees. "And I got to give our sister Jessica Chastain her props".
Jada Pinkett Smith has heaped praise on fellow actress Jessica Chastain for helping Oscar victor Octavia Spencer fight for pay parity. You and I are gonna to be tied together. "She said, 'we're going to be tied together, we're going to make the same thing and you're going to make that amount".
Two baby monkeys get cloned into existence
The Chinese team solved the problem by switching on and off certain genes that were preventing the embryos from forming properly. Monkeys are commonly used in medical research on brain diseases like Parkinson's , cancer, immune and metabolic disorders.
Smith said that it was nice to march and wear black to award shows, but asked what was "being done behind closed doors". That's why Jessica Chastain believes she is walking the walk.
"We were talking about pay equity with men and women", Spencer said. "We're not doing this anymore'".
Octavia Spencer said on Wednesday she loves her friend and co-star Jessica Chastain, and for a good reason. So I'm emotional because I haven't had the time to process it, and it's real. "Men should start doing this with their female co-stars". I said, "Yeah!" She had an idea and she went off to work and I went off to work. And women do have to produce, because she's producing this.
Chastain also told the audience at the Palm Springs Film Festival that a significant change was coming so that women would be able to speak up for themselves.
The actress, who was nominated on Tuesday for the Best Supporting Actress Oscar for her role in "The Shape of Water", said she was excited to take on a comedy and move away from "period pieces".