Garrard Conley turned down the opportunity to write the adaptation himself as he believed a filmmaker would be better fit to translate his memoir to the big screen.

Focus Features won the rights to the film in a bidding war against Annapurna Pictures, Netflix and Amazon Studios.

By the time Garrard Conley's memoir was released in 2016, only a handful of states had banned gay conversion therapy, those being Vermont, California, New Jersey, Illinois and Oregon, along with the District of Columbia (Washington, D.C.). Mainstream health and medical groups have rejected the underlying assumptions that LGBTQ people need to or can change their sexuality.

24 years before appearing in this film as the unsympathetic father, Russell Crowe played the role of a young gay man in the 1994 Australian film, The Sum Of Us, in which the father was much more tolerant.

This was the first collaboration between longtime friends Nicole Kidman and Russell Crowe. They were previously set to co-star in a 2005 adaptation of the Australian novel "Eucalyptus," which would have been directed by Jocelyn Moorhouse. The troubled production was shut down during table reads of the script and Kidman and Crowe had looked for a new shared project ever since.

Actor and singer Troye Sivan who plays the character named Gary in the movie, has also contributed an original song to the movie called "Revelation".

3 of the 4 top billed cast are Australian or Kiwi. At least 4 of the cast members are Australian.

Viggo Mortensen was considered for the role that went to Russell Crowe.

Boy Erased (2018) is one of two 2018 movies about teenagers forced to undergo LGBT conversion therapy. The other is The Miseducation of Cameron Post (2018).

Joel Edgerton has several credits on this film: as director, writer, and actor (for his supporting role as a therapist).

Lucas Hedges' father, Peter Hedges, directed Joel Edgerton in the film The Odd Life of Timothy Green.

The film premiered at TFF (Telluride Film Festival) in September 2018.

This will be the first film to feature both Russell Crowe and Nicole Kidman.

Russell Crowe played the gay son of Jack Thompson in The Sum of Us (1994). Thomspon also played the father of Joel Edgerton's character in Star Wars: Episode II - Attack of the Clones (2002).

Both Russell Crowe and Nicole Kidman have starred in DC movies. Crowe in Man of Steel (2013) and Kidman in Batman Forever and Aquaman.

Both Russell Crowe and Nicole Kidman play the parents of heroes in the DC Extended Universe. Crowe played Jor-El, father of Clark Kent/Superman, in Man Of Steel (2013) and Kidman plays Queen Atlanna, father of Arthur Curry/Aquaman, in Aquaman (2018).