Kangana Ranaut was admitted to ICCU ward at Apollo Hospital Hyderabad after suffering a major injury during a fight scene where in she got 15 stitches.
During a sword fight scene between Kangana Ranaut and Nihar Pandya the timing went wrong and the sword hit on Kanagana Ranaut's head between her eyebrows injuring her grievously.
In the final phase of Manikarnika, Sonu Sood walked out from the film due to the busy schedule of Simba. Rumours went around saying that there is a fallout between Kangana and Sonu. However, at the end of the day Zeeshan Ayyub replaced Mr. Sood.
Richard Attenborough was planning to make the film in Hollywood with Hema Malini in 1991. Then years later Aishwarya Rai was to do the film with another producer .
The action scene where Kangana Ranaut got injured she had decided to do the scene herself without body double.
Kangana Ranaut was accused of editing out major part of many actors which were shot by director Krrish including part of Atul Kulkarni.But Ankita Lokande came to her rescue saying her scenes were not edited.
Veteran actress like Asha Parekh and Waheeda Rahman praised Kangana Ranaut for her acting and direction.
Director Kkrish quite the film midway to direct NTR biopic 2019.It was also stated that he quit the film due to fallout with Kangana Ranaut.
Hansal Mehta blamed Kangana Ranaut for ill health of Kamal Jain following which he was slammed by her.
Political party Shiv Sena had warned filmmakers not to release any film on 25th January 2019 alongside their film Thackrey 2019 based on life of their party supremo Late Balasaheb Thackrey.Kangana Ranaut stated that if any one comes on between release of her film will have to face consequences ultimately both films released on same day and did well.
Suresh Oberoi's comeback film after 8 years his last release was World Cup 2011 in 2009.
Kangana Ranaut's fifth title role after Rajjo 2013, Queen 2014,Revolver Rani 2014 and Simran 2017.
Films producer Kamal Jain was hospitalized a week before it's release and was rumored to be critical after suffering paralytic stroke.But the next day it was reported as lung infection.
Sony Sood had short for most of his portions when Krrish directed the film after Kangana Ranaut took the direction she wanted him to shoot again for some portions.Sonu Sood was shooting for Simmba 2018 then and had date issues also he needed to spot clean shaven look which wasn't possible as he was spotting full beard look in Simmba.Mohdmmad Zehshaan Ayub replaced him at the last moment.
A special screening of the film was organized by Zee Entertainment for Ram Nath Kovind, the President of India, at Rashtrapati Bhavan, Cultural Centre on 18 January in presence of Kangana Ranaut and rest of the team.