Tanhaji: The Unsung Warrior is a 2020 Indian Hindi-language historical action film, co-written and directed by Om Raut and produced by Bhushan Kumar, Krishan Kumar and Ajay Devgn under T-Series Films and Ajay Devgn FFilms. Tracing the life of Maratha warrior Tanaji Malusare, it stars Ajay Devgn as the eponymous lead, Kajol and Saif Ali Khan. It also features Neha Sharma, Sharad Kelkar and Luke Kenny in supporting roles. Set in the 17th century, it revolves around Tanaji's attempts to recapture the Kondhana fortress once it passes on to Mughal emperor Aurangzeb who transfers its control to his trusted guard Udaybhan Singh Rathore.

The film was originally named Tanaji: The Unsung Warrior but the name was later changed to Tanhaji. The film was launched on 20 July 2017, with Raut making his directorial debut in Bollywood. Raut, who previously directed Lokmanya: Ek Yug Purush (2015), for which he received acclaim, the film was simultaneously dubbed in Marathi following popular demand. Principal photography commenced on 25 September 2018, and completed within May 2019. Filming took in mostly across the Film City in Mumbai, and few scenes shot at Pune. The cinematography and editing were handled by Keiko Nakahara and Dharmendra Sharma. The background score was composed by Sandeep Shirodkar; the soundtrack album was composed by Ajay–Atul, Sachet–Parampara and Mehul Vyas and released under the label T-Series.

Tanhaji was released in India in 3D and conventional formats on 10 January 2020. The film received wide critical and public praise for Devgn and Khan's performances, the visual effects, cinematography, action sequences, art direction, music, score, and editing. The film grossed ₹375 crore (equivalent to ₹441 crore or US$55 million in 2023) worldwide and was declared a major success at the box office, thus becoming the highest grossing Hindi film of 2020 as well as highest grossing Indian film of 2020. It became the 28th highest grossing Indian film of all time. The film was selected as one of the Best Foreign Film to be screened at the 78th Golden Globe Awards. At the 68th National Film Awards, the film won the awards for Best Popular Film Providing Wholesome Entertainment, Best Actor (Devgn) and Best Costume Design. At the 66th Filmfare Awards, Tanhaji received 13 nominations, including Best Film and Best Actor (Devgn), and won 4 awards, including Best Director (Raut) and Best Supporting Actor (Khan).