Susannah Grant: Susannah Grant. Writer: Erin Brockovich. Susannah Grant was born on 4 January 1963 in New York City, New York, USA. She is a writer and producer, known for Erin Brockovich (2000), Unbelievable (2019) and The 5th Wave (2016). She has been married to Christopher Henrikson since 1995. They have two children.
