McDonnell began her career as the co-director and executive producer on the 2016 short film
Meet Cute. She then rose to prominence after writing two episodes of the
Disney+ series
WandaVision, set in the
Marvel Cinematic Universe (MCU). In January 2020, she entered negotiations to write the screenplay for the 2023 MCU film
The Marvels, and she eventually co-wrote the film with
Nia DaCosta and
Elissa Karasik. In August 2022, she wrote episodes for the Marvel Studios series
Agatha All Along. Prior to 2019, McDonnell was the producer for the
Scriptnotes podcast. == Filmography ==