- Country: India
- Genres: Comedy, Drama, Family
- Release: 1997-12-19
- Director: Kamal Haasan
- Writers: Gulzar , Kamal Haasan , Crazy Mohan
- Language: Hindi
- Stars: Kamal Haasan , Kamal Haasan , Amrish Puri (1932–2005) , Om Puri , Tabu (I) , Johnny Walker , Paresh Rawal (I) , Nasser (I) , Ayesha Jhulka
- Runtime: 155 min
- Awards: 1 win & 6 nominations
- AKA: Chikni Chachi (India) , The Trickster Aunt (United States of America) , Chachi 420 (India) , Chachi 420 , Тётя 420 (Russian Federation)
- Plot: Wealthy Janki falls in love with poor Jaiprakash, much to the displeasure of her parents, and ends up getting married, and living with her husband. She subsequently gives birth to a daughter. Differences surface between the couple, and Janki leaves Jaiprakash and moves back in with her parents. Jaiprakash wants to see his daughter, but is prevented by Durgaprasad, Janki's dad, so he assumes the guise of a woman, calls himself Laxmi, and starts working as a nanny for his daughter. Complications arise when Durgaprasad gets attracted to Laxmi and wants to marry 'her'.
- IMDB:tt0233422
Chachi 420 Cast · · · ALL
Kamal Haasan
Director
Kamal Haasan
Jaiprakash Paswan / Laxmi Godbhole
Om Puri
Banwarilal Pandey
Johnny Walker
Joseph
Paresh Rawal
(I)
Hariharan 'Haribhai'
Ayesha Jhulka
Ratna
Fatima Sana Shaikh
Bharti
Rajendranath Zutshi
Dr. Rohit
Tabu
(I)
Janki Paswan
Amrish Puri
(1932–2005)
Durgaprasad Bhardwaj
Nasser
(I)
Siraj Akhtar
R.S. Shivaji
Driver
Madhan Bob
Henchman
Raghuram
Dance master