Actor Robert Pattinson might make a cameo appearance on American drama series 'Entourage' for the final episode of the ongoing series, if rumours are to be believed.

The 'Twilight' star is said to be making an appearance as a 'particularly difficult client' of fictional film agent Ari Gold, played by Jeremy Piven, reports contactmusic.com.

Sources said Pattinson has already shot for a few scenes for the episode, due to air in the US Sunday.

Pattinson, who was catapulted to fame after he played Edward Cullen in the 'Twilight' series, says he likes to do small assignments to keep busy.

'I just want to work as much as I am now. I like working all the time because I spent so many years before 'Twilight' just doing stuff for two or three months of the year. The rest of the time I'd do nothing, or I'd just have tiny little jobs.'

The 24-year-old is not the only high profile name set to join the 'Entourage' cast. Eminem and Christina Aguilera too will be part of the special episode.