- She belongs to a Marathi family and has two siblings, an elder sister Lochan who is married and a younger brother Mandar.
- Her nickname is Goli.
- Mrunal pursued her B.Tech, TYBMM (Journalism) from Kishinchand Chellaram College, Mumbai.
- During her college days, she on the Star Plus show Mujhse Kuchh Kehti…Yeh Khamoshiyaan which was her debut opposite Mohit Sehgal as Gauri Bhosle.
- Mrunal Thakur then got a chance to play the role of a journalist on the Star Plus show Har Yug Mein Ayega Ek Arjun. In April 2013, she also hosted a Hindi play called Do Fool Chaar Mali along with co-host Barun Sobti, which was directed by Manoj Verma and Iss Pyaar Ko Kya Naam Doon? team members.
- In the year 2014, she participated in the sports reality entertainment show Box Cricket League.
- She has been a contestant in the show Nach Baliye season 7 along with her longtime boyfriend Sharad Chandra Tripathi.
- She rose to fame for her lead role as Bulbul in Zee TV’s Kumkum Bhagya opposite Arjit Taneja.
- Mrunal has been a part of the Marathi films Hello Nandan, Vitti Dandu, Surajya and Rangkarmi.
- Mrunal Thakur made her international debut by taking up the lead role in Tabrez Noorani and Life of Pi producer David Womark’s 2018 Indo-American film Love Sonia, which portrayed the issue of global human trafficking. Mrunal reportedly stayed near a brothel in Kolkata to study the body language of the prostitutes for the film.
- After watching her performance in an Indo-American film ‘Love Sonia,’ Aamir Khan offered her a role in his film “Thugs of Hindostan”(2018), but she rejected the offer. According to media reports, she did not want to sign a three-film contract with the production company, Yash Raj Films, as it would have affected her international career.
- Mrunal Thakur was also the part of the Indonesian soap opera, Tuyul & Mbak Yul Reborn.
- She has done hindi movies like Super 30, Batla House with Hritik Roshan, John Abraham respectively.
- Recently, she has been part of Netflix anthology film Ghost Stories, directed by Karan Johar.
- Soon, she will be seen in Jersey (official remake of the 2019 Telugu film “Jersey” ) opposite Shahid Kapoor and Toofan with Farhan Akhtar.