Robert Patrick has been signed up as a series regular for the sixth season of True Blood.

The Terminator 2 star previously appeared in three episodes of the HBO drama's fifth season as Jackson Herveaux, the father of Alcide (Joe Manganiello).

He will reprise the role on a regular basis for the show's next run, which will premiere in the US in summer 2013, Deadline reports.

Patrick can currently be seen playing a recurring role on nuclear submarine thriller Last Resort - which ABC axed last month, allowing the 54-year-old star to sign a new contract with True Blood.

His past credits include television roles on The X-Files and The Sopranos and film appearances in 1998's The Faculty and 2005's Walk the Line. He will next be seen in 2013 action drama Gangster Squad.

FX UK

Joe Manganiello previously claimed that it had been "so great" to work with Patrick, calling the actor's True Blood performance "creepy" and "dark".

New episodes of True Blood will start filming in January.

> True Blood casts ex-EastEnders star Rob Kazinsky

> True Blood: Blade Runner star Rutger Hauer becomes series regular



Watch a clip from the True Blood fifth season finale below:

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