Purno Doirgho Prem Kahini (transl. Full-length Love Story) also known by initialism as PDPK, is a 2013 Bangladeshi romance film written by Rumman Rashid Khan and directed by Shafi Uddin Shafi. The film stars Shakib Khan, Joya Ahsan, and Arifin Shuvoo with Razzak, Anwara, Diti, Subrata, Lamia Mimo and Saju Khadem in supporting roles.

The plot of the film revolves around Joy, an aeronautical engineer who goes to Malaysia to find his long-lost aunt, and falls in love with Zara. Shakib, a billionaire businessman and Zara's childhood friend, also confesses his love for her. The film takes a dramatic turn when Joy discovers that Zara is the daughter of his aunt while Shakib plots to make Zara fall in love with him.

Purnodoirgho Prem Kahini was theatrically released on 16 October 2013, on the occasion of Eid al-Adha. The film opened to major critical success and earned numerous accolades. It received six Meril Prothom Alo Awards nominations, with Khan winning Best Actor and Ahsan winning Best Actress. The film had the longest theatrical run in 2013, completing over 100 days at the box office. The film was a blockbuster at the box office, and one of the biggest film of 2013. Due to the film's commercial success, the producers announced a sequel titled Purno Doirgho Prem Kahini Two, which was released on 8 April 2016.