Next on Tina Fey's To-Do List: Making Mean Girls a Musical OK, we're a little embarrassed by our plans to laze by the pool all summer By Jenn Gidman, Newser Staff Posted Apr 20, 2016 1:11 PM CDT 5 comments Comments Tina Fey attends "Tribeca Talks: Storytellers" during the 2016 Tribeca Film Festival at BMCC Tribeca Performing Arts Center on Tuesday in New York. (Photo by Charles Sykes/Invision/AP) (Newser) – Sure, Tina Fey had a stint on SNL, a seven-year run on 30 Rock, co-hosted the Golden Globes, and has new Netflix hit Unbreakable Kimmy Schmidt, but now the 45-year-old comedian and writer is putting together a musical based on the 2004 movie Mean Girls, which she wrote, the Guardian reports. Speaking with TV Guide writer Damian Holbrook at the Tribeca Film Festival on Tuesday, Fey notes that she has a long summer break before Schmidt starts filming its third season in October (star Ellie Kemper just announced she's pregnant), giving her time to wrap things up, per Entertainment Weekly. One of the biggest challenges in adapting the film to the stage? Getting rid of outdated references while staying as faithful as possible to the original script. "Like three-way calling is not a thing [anymore]," she noted.