Movies
Rex Features
The film, which will star Gavin & Stacey's Mathew Horne and James Corden, casts the singer as a lesbian vampire living in a cursed village.
"James wants Lily to take on a bigger part but she is happy with a cameo," a source is quoted as saying.
Directed by Phil Claydon with a script from newcomers Paul Hupfield and Stewart Williams, Lesbian Vampire Killers is scheduled for release next year.
Corden was romantically linked with Allen in April.
Movie Reviews
'Extremely Loud & Incredibly Close' reviewTom Hanks features in a long and winding journey through New York after 9/11
At the Movies
This Week's 5 Hottest Movie VideosTrailers for The Avengers and Spider-Man are among this week's highlights in film.
Movies Interviews
Daniel Radcliffe talks 'Woman in Black'The actor talks to Digital Spy about his first post-Potter outing.
Box Office Charts
'Chronicle' leads UK box officeSuperhero drama Chronicle leads the UK box office ahead of Journey 2.
