Bhool Bhulaiyaa (transl. Labyrinth) is a 2007 Indian Hindi-language psychological comedy horror film directed by Priyadarshan from a screenplay by Neeraj Vora and produced by T Series. It is a remake of the 1993 Malayalam-language film Manichitrathazhu written by Madhu Muttam and directed by Fazil, which is based on a 19th-century tragedy that happened at Madhu's Alummoottil tharavad (an old traditional mansion) in Muttom (near Haripad) in central Travancore. The film stars Akshay Kumar, Vidya Balan, Shiney Ahuja, and Ameesha Patel, alongside Paresh Rawal, Rajpal Yadav, Manoj Joshi, Asrani and Vikram Gokhale. The film score and soundtrack were composed by Ranjit Barot and Pritam respectively, with lyrics written by Sameer and Sayeed Quadri.

The film was shot under the working title of Chandramukhi in Jaipur, mainly at the Chomu Palace (a haveli) and also the City Palace, while the song "Allah Hafiz" was shot at Hampi. Madhu, the writer of the Malayalam film, has been credited as the sole writer for the remakes after he filed a copyright suit against Fazil when the latter started being listed as the writer of the original script in the remakes.

Produced on a budget of ₹32 crore, Bhool Bhulaiyaa earned ₹82.84 crore, thus becoming the eighth-highest grossing Hindi film of 2007. It received mixed reviews from critics. However, the film has attained a cult status, with praise towards Kumar's psychiatrist character, Balan's portrayal of Avni and Manjulika, and its music. The film spawned a standalone sequel titled Bhool Bhulaiyaa 2 (2022) with a new principal cast. The third film in the series, Bhool Bhulaiyaa 3, with Vidya playing an alternate version of her character, released on Diwali 2024.