Development After
wrapping work on
Asuran in mid-2019, it was reported that director
Vetrimaaran was in talks with
Soori as the lead for his next directorial venture.
Elred Kumar would reportedly be project under the banner
RS Infotainment. The production was reported to begin after the director completed the post-production for
Asuran. The following October, Vetrimaaran confirmed that he would direct Soori's debut as a lead. The company made a public announcement a few days later, and it was
tentatively titled Production No. 15,. However, due to the
COVID-19 pandemic, the commencement of production was postponed. To reduce production costs, the makers reportedly began filming the portions with an
IPhone, which was never done before in Tamil cinema. The film's official title
Viduthalai was announced on 21 April 2021. Originally intended to be a single film, it was later
split into two parts. Cinematography was handled by
R. Velraj, editing by R. Ramar, and action choreography by
Peter Hein. While Vetrimaaran initially claimed he was inspired by
B. Jeyamohan's short story
Thunaivan, commentators noted that the film was closer to
Solakar Thoddy (2013) by S. Balamurugan. In the opening credits, Vetrimaaran attributes the "basic idea" to the novel
Vengaichami by Thangam, and adds that the film is based on an undisclosed short story by Jeyamohan.
Casting and filming Soori worked with Vetrimaaran from the inception of the project, and
Viduthalai Part 1 became his first film in a leading role. He said
Vijay Sethupathi earlier advised him to explore all kinds of roles and not restrict himself to the comedic roles he was primarily known for. Sethupathi eventually joined the cast, with his character based on Kaliyaperumal Vaathiyaar, a member of the Tamil Desiyam Group who operated in the 1980s. In January 2021,
Bhavani Sre, sister of composer
G. V. Prakash Kumar, was announced to be playing the female lead, in her third feature film after
Ka Pae Ranasingam and
Paava Kadhaigal (both 2020). In April 2021,
Gautham Vasudev Menon was reported to play the role of a police officer. The filmmakers moved to
Sathyamangalam forest to prepare to shoot major sequences featuring Soori during December 2020. The shooting of the film took place in Sathyamangalam for three months, and the filmmakers moved to
Chengalpattu in April 2021, in which the filmmakers erected a police camp set, and shot there for 20 days. The filmmakers later planned to shoot the last leg of the film at Sathyamangalam after the
COVID-19 lockdown restrictions there ended. Principal photography wrapped by 31 December 2022. == Music ==