The music of the film was composed by Rohan-Rohan and Sandeep Shirodkar with lyrics by Dr Sunil Jogi, Manoj Yadav and Manndar Cholkar. The film's score was composed by Amar Mohile.
Thackeray received mixed reviews from critics.[13] Times of India gave the film 3 stars out of 5 and states: "While the honesty is commendable, it comes across that the lead character's political motivations lack clarity. Perhaps a more seasoned writer, could have fleshed out Thackeray's characters and eccentricities a lot better. But, its Nawaz's nonchalant performance that overshadows the flaws and leaves a lasting impact."
Times Now went with 2.5 stars out of 5 and has to say: "A lot of focus is put on making the film a tearjerker by emphasizing the aftermath of the riots, violence and fights that pretty much summed up Shiv Sena's history under the guidance of founder, Bal Thackeray. The film is good because of Nawazuddin's performance but it cannot be considered as one of the best biopics ever created."[14]
The life time domestic Box office collection is ₹316 million (US$3.7 million) as per Taran Adarsh.[3] Raut also plans to continue the film with a sequel.[15]
“Nawazuddin has repeated 'Uthao lungi bajao pungi' (lift the lungi and *'#$ him) in the film #Thackeray. Clearly hate speech against South Indians... In a film glorifying the person who said it! Are you planning to make money out of this propaganda? Stop selling hate! Scary stuff!"