In the book Ziggy is named after Bob Marley's son Ziggy Marley at the behest of Jane's brother.
This is the fourth project Shailene Woodley and Zoë Kravitz have done together after Divergent (2014), The Divergent Series: Insurgent (2015) and Allegiant (2016).
This is the second time Shailene Woodley and Laura Dern have worked together after The Fault in Our Stars (2014).
This is the second project Laura Dern, Reese Witherspoon and Jean-Marc Vallée have worked on together after Wild (2014).