Billu Barber is a 2009 Indian Hindi-language comedy drama film directed by Priyadarshan and produced by Red Chillies Entertainment. It stars Irrfan Khan as the titular character, alongside Shah Rukh Khan and Lara Dutta in the leading roles. Kareena Kapoor, Priyanka Chopra and Deepika Padukone make special appearances in the songs. The film was released on 13 February 2009.

It is a remake of the 2007 Malayalam film Katha Parayumpol and is loosely based on the story of friendship between Krishna and Sudama in the Bhagavata Purana. The film was screened at the 2009 Hawaii International Film Festival.

Billu is a poor barber who lives with his wife Bindiya and their two children, Gunja and Ronak, in the village of Budbuda. He also spends time with his close friends Budbudiya and Naubat Chacha. Billu lives an uneventful life until Bollywood superstar Sahir Khan comes to the village for a film shoot.

Billu had mentioned to his family that he knows Sahir from the past but has never elaborated on how he knows the star. When his children talk about their father's friendship with the star, word spreads throughout the village. Virtually overnight, Billu, who had previously been scorned by most due to his lowly state, becomes the center of attention. People who had spurned him only the week before now call him a close friend so that he will introduce them to Sahir. Billu refuses and downplays the friendship. Even so, the powerful businessman Sahukaar Daamchand demands to see Sahir and offers Billu expensive gifts in order to gain such a meeting. When Billu consistently fails to introduce the people of the village to Sahir, his situation changes once again. He is accused of lying about his friendship, and everyone – including his wife and children – begins to doubt his character and integrity. Rather than defend himself, Billu remains quiet about the nature of his and Sahir's friendship.

On Sahir's last day in the village, the star speaks at Gunja and Ronak's school function. He tells the children about his impoverished childhood, when he had nothing but a special bond of friendship with another young boy, named Billu. It was Billu who had taken care of Sahir and eventually helped him travel to Mumbai by giving him his gold earring, where Sahir became a movie star. Billu, who is standing at the back of the event, leaves during the talk without revealing to Sahir that he is there. However, the townspeople, realizing their fault in ostracizing Billu, take Sahir to Billu's house. Billu's children come home and apologize to their father for the trouble they caused him. All of a sudden, Sahir enters Billu's home, reuniting with his best friend. They hug and embrace each other, with the whole village and Billu's family happily watching. In the end, Sahir must leave for another shoot but promises that his and Billu's friendship is reignited and will remain friends.

Director Priyadarshan cast Irrfan Khan, Shah Rukh Khan and Lara Dutta Bhupathi in pivotal roles in the film. While these roles were initially offered to Akshay Kumar and Tabu, Kumar eventually opted out of the project due to date clashes, as did Tabu. The director then offered Kumar's and Tabu's role to Shah Rukh Khan and Ameesha Patel respectively, and both of them agreed to do the film. Patel also opted out of the film and sources have indicated that Juhi Chawla was signed on for the role.

In April 2008, the director announced that he had cast Lara Dutta as Billu's wife. The cast began filming for the project on 8 April 2008 and according to Shahrukh Khan, "the film is a sweet story of friendship...quite similar to the bond shared between Krishna and Sudama". The film also features Kareena Kapoor Khan, Priyanka Chopra Jonas and Deepika Padukone Singh in item numbers with Shah Rukh Khan.

Filming took place in Pollachi, Tamil Nadu, and at Film City in Goregaon, Mumbai.