Stories from the set

Early drafts of the script suggested that Drago Bludvist would again become the film's main antagonist and would be redeemed by the finale.

Justin Rupple replaced T.J. Miller as the voice actor for Tuffnut Thorston because, in mid-2018, Miller found himself at the center of a whole string of scandals.

In September 2012, 20th Century Fox and DreamWorks Animation announced that the film would be released on June 17, 2016. In September 2014, the film's release date was pushed back to June 9, 2017. In January 2015, the release date was pushed back to June 29, 2018. In total, the film's release date was changed 6 times.

While working on the film, DreamWorks Animation had to develop new software (for example, for the Light Fury).