Amitabh Bachchan in RGV's 'Department'

Mega star Amitabh Bachchan will be seen doing a cameo in Ram Gopal Varma's upcoming film 'Department'.

The film, which was earlier offered to Abhishek Bachchan in the lead role, will now see actor Rana Daggubati instead beacuse of date issues with junior Bachchan.

"Ram Gopal Varma's Department where I have agreed to do a friendly appearance begins next week and that should come as a somewhat better proposition for me," Amitabh wrote on his blog.

The two have worked together before in movies 'Sarkar','Sarkar Raj' and 'Rann. Amitabh will be seen playing a gangster-turned-politician in the film.

The cast of the film also includes Sanjay Dutt, Raveena Tandon, Nasseruddin Shah and Anjana Sukhani.