Many of the live action scenes were filmed in Australia. Luckily, the rabbits were not real, as they are an introduced pest in Australia (in the late 1800s, the country was overrun with rabbits) and live rabbits cannot be brought into the country (with very few exceptions).
Peter Rabbit is a fictional anthropomorphic character in a children's book series of the English natural scientist and writer, illustrator Beatrix Potter. He appeared for the first time in 1902 and between 1904 and 1912 in five subsequent books, and had 2 TV Shows, being The World of Peter Rabbit and Friends (1992) which did TV adaptions of 9 different Beatrix Potter stories (some of them were even combined) and Peter Rabbit (2012) which features Peter and friends as much younger rabbits.
Before the release, people thought the McGregor in the movie was the same McGregor from the stories, but when it arrived, it turned out to be his nephew played by Domhnall Gleeson, while the real thing was played by Sam Neill.
The way Peter's face goes red after being attacked by Thomas McGregor slightly resembles an injured rabbit from the film Watership Down (1978), which was released forty years prior. That film is also about rabbits in England and starred John Hurt, who previously collaborated with James Corden in the CGI TV film adaptions of The Gruffalo (2009) and The Gruffalo's Child (2011).
Brazilian group Rouge was invited by the film's studio to do new versions of songs "I Promise You" and "Small As Your Dreams" in Portuguese. Their song "Bailando" is also featured in the end credits of the film.
Prior to the release of the film, Matt Lucas and Hugh Grant were thought to have been the voices of Benjamin Bunny and Mr. Tod, respectively. They are actually voiced by Colin Moody and Fayssal Bazzi, respectively.
This was the first Sony Animation film where the main antagonist redeems himself in the end. However, it is shown in the video game adaption of the sequel to Hotel Transylvania (2012) that Quasimodo the Devious Chef had redeemed himself since the first film.
During the end credits, it is shown that Bea, Thomas, opened a toy shop and artist studio together. Where Bea begins to write and illustrate books based on Peter and his friends. The shop is imm Windermere not London as stated previously.