"It's like a good marriage," Poehler says of her relationship with Fey

Credit: Steven Pan

Tina Fey and Amy Poehler‘s friendship inspires envy, and now that they’re playing sisters on the big screen the dynamic duo is dishing on how they’ve kept close over the years.

In Glamour‘s January Social Media Issue the women ask each other fan-submitted questions, like “what’s your secret to maintaining your 20-some-year friendship?”

“We don’t see each other very often,” Fey, 45, quipped.

“That’s right,” Poehler chimed in, laughing. “It’s like a good marriage. My mom always says it’s very important to have people in your life who knew you when. The older you get, the more you treasure that idea of someone knowing your family and where you came from, and being around during these times and these times.”

Poehler, 44, said that as neither of the stars have sisters they’ve instead “rented them.”

“We found sisters,” Fey clarified.

The women, whose comedy Sisters is out Dec. 18, first met taking improv classes in Chicago in 1993 before both eventually joining Saturday Night Live – which they’ll return to as hosts later this month.

The Most Hilarious Tina Fey and Amy Poehler Moments – Ever

It’s safe to say the stars are close, so listing each other’s accomplishments comes easily.

“I think one of your greatest accomplishments was transitioning from the captain you were at SNL to creating a show [30 Rock],” Poehler said of the Admission actress. “That is so hard – extricating yourself from a place you were so comfortable and successful, then doing something else so well. That, and the fact that you invented the word flerm.”

Fey, who echoed Poehler’s sentiments about the challenges of graduating from Saturday Night Live, named Poehler’s Smart Girls campaign as her crowning achievement. Smart Girls is a positive online community for young girls.

“I would say that one of your greatest accomplishments, Amy Poehler, is that you have so successfully used your art and comedy as a source of positivity in the world,” she said, “By creating Smart Girls, by making [Leslie in] Parks and Recreation not only a positive feminist character but creating a good-hearted worldview within that program.”

The women admit they had no idea what direction their lives would take, but are happy they had each other along for the ride.