The popular crime drama is looking for a young woman aged between 18-21 with youthful looks to play the role of 16-year-old schoolgirl Daisy - a friend of babysitter Katie, who featured in the first series.
Daisy is described as a "glamorous and confident" character that "all the boys want to be with and all the girls want to be".
The role requires a locally based actress with a Northern Irish accent who has previous acting experience.
They need to be available for approximately 5-10 days from 24 February-16 June 2014.
Further information on casting applications can be found here.
The second series of The Fall is due to begin filming in Belfast next month.
The BBC and RTÉ drama stars former X-Files actress Gillian Anderson and Co Down actor Jamie Dornan as DSI Stella Gibson and serial killer Paul Spector.
Filming for the hit series was due to begin in the city at the start of January, but work commitments of the leading actors meant shooting had to be pushed back until the end of February.
Anderson is currently working on the NBC drama Hannibal, while Dornan is filming the screen adaptation of the hugely successful Fifty Shades of Grey novel.