The Playlist are reporting that Jennifer Garner will be joining Peter Hedges’ The Odd Life of Timothy Green.

The Odd Life of Timothy Green is based on an idea by the film’s producer Ahmet Zappa and is a “modern day fable that centers around a child-prodigy musician and his parents.”

Garner is attached to play the child-prodigy’s mother, while offers have gone out to Mark Wahlberg and Joaquin Phoenix to portray the father.

No details on when production is expected to start, or whether it’ll come before Garner’s other new project, Better Living Through Chemistry.