Filmmaker Sujoy Ghosh made his directorial debut in 2003 only with `Jhankaar Beats`, but he is already thinking of retiring.

On his 48th birthday Wednesday, the `Kahaani` director received wishes from his fans and celebrities like Farah Khan, Alia Bhatt, Bipasha Basu and Uday Chopra.

Soon after, he tweeted: `Thank you all so much for your kind wishes. Feels good to be 48. Soon, I can retire and give elderly gyaan (advice).`

Meanwhile, Ghosh and Suresh Nair have written the screenplay of "Bang Bang`, which stars Hrithik Roshan and Katrina Kaif.