London, Aug 10 - Irish actor Colin Farrell has been tipped to take the lead role in a movie about Spanish literary hero Don Quixote after superstar Johnny Depp pulled out due to scheduling conflicts.

Director Terry Gilliam lined up Depp in 2000 to star as advertising executive Tony Grisoni in the movie, originally entitled 'The Man Who Killed Don Quixote' but a series of disasters delayed production of the oddball epic, prompting the 'Pirates of the Caribbean' actor to bow out, reports buzzhollywood.com.

The 68-year-old filmmaker is now said to be eyeing Farrell as a possible replacement as he finally gears up to begin filming next year.

'Terry is a fan of Colin and it's felt he's one of the few people capable of filling Johnny's shoes,' said a source.

Both Depp and Farrell were also among the stars who stepped in to help Gilliam complete his 2009 adventure 'The Imaginarium of Doctor Parnassus' after its star Heath Ledger passed away last year.