This is Us writers Isaac Aptaker and Elizabeth Berge are behind the surprising delay on How I Met Your Father.
The pilot centers on Sally, and follows a young New York City woman's misadventures in love, with Meg Ryan serving as the narrator.
Greta Gerwig is starring in this spin-off of How I Met Your Mother, which recently ended its nine-season run.
The Frances Ha actor will play Sally, a female Peter Pan that has never grown up and has no idea of where her life is headed in How I Met Your Dad.
How I Met Your Dad will tell an all-new story, while taking place at some of the same locations. Expect a 2014 fall debut.