Best Friends Forever will join the growing ranks of TV shows written by and starring women when it debuts tonight. The series is the brainchild of longtime friends and improv buddies Lennon Parham and Jessica St. Clair, and the duo recently welcomed us to spend a day on the set of the new comedy. The show explores what happens when "friendsbians" — as Lennon and Jessica describe themselves— find themselves at very different places in their romantic lives. Rounded out by a supporting cast of cute and equally hilarious guys, and with in-demand director Fred Savage behind the camera, Lennon and Jessica mine their personal lives for laughs on the sitcom. Find out what the stars had to say about the show in our behind-the-scenes preview, and catch Best Friends Forever's premiere tonight at 8:30/7:30 Central on NBC!