Starring Irrfan Khan as Billu and Shah Rukh Khan as superstar Sahir Khan .
If you're interested in watching the movie, I would recommend exploring official streaming platforms or purchasing a DVD/ digital copy from authorized sources. Billu Barber Movie Download Filmyhit
For a "paper" on the movie, I can offer a brief summary: Starring Irrfan Khan as Billu and Shah Rukh