Tonight on The Kelly File, Megyn Kelly talked to Facebook COO Sheryl Sandberg and announced that she was happy to be joining her latest "Lean In Together" campaign.

"When women support each other, we accomplish amazing things," the promotional video message, featuring Megyn, says.

Sandberg said the campaign is "all about how women support each other."

She dismissed the notion of workplace "cattiness," saying that women can disagree while still supporting each other.

"We need to tell everyone to expect women to have voice, women to have strength, women to lead, and women to support each other," she said.

Megyn also offered a tip for women who struggle with getting interrupted: say "I'm not done speaking."

"It works like a charm," she said. 

Watch the full conversation below and learn more about the campaign here.