David Threlfall lands role in Ripper Street crime series
David Threlfall is to become a regular on grimy crime series Ripper Street.
The star, best known for his role as Frank Gallagher in Shameless, will play Abel Croker - wharfinger, villain and keeper of other men's secrets, Amazon said.
The fourth series of Ripper Street has just begun filming in Dublin and Threlfall will join show favourites including Matthew MacFadyen and Jerome Flynn.
Other new faces confirmed for series four include David Warner, Matthew Lewis and Killian Scott, while Jonas Armstrong will appear in a yet to be confirmed role.
Richard Warlow, series creator and writer, said: "From our new studio set in Ireland, it has been a delight to watch this cast reunite and grow.
"As these new characters' lives take shape on the page it is a daily inspiration to know that they will be brought to life by the most magnificent troupe of actors Ripper Street has yet assembled."
When Ripper Street series three launched on Prime Video last November it was streamed more than any other TV show, attracting larger viewing audiences than some of the biggest US shows on the service including Constantine, The Walking Dead and Amazon exclusive show Vikings.
The drama was resurrected by Amazon Prime after an outcry from fans when it was dropped by the BBC.
Series four of Ripper Street will premiere on Amazon Prime Instant Video on a date still to be announced.