'Once Upon a Time' Season 4 Spoilers: 'The Originals' Actor Sebastian Roché To Guest Star As King Stefan In Second Half Of Season 4

"The Originals" actor Sebastian Roché has landed a role in "Once Upon a Time" Season 4. The latest casting reports on the ABC fairy tale drama series claim that the vicious vampire hunter in the CW spinoff series will guest star as King Stefan, Princess Aurora's (Sarah Bolger) father, in the second half of season 4 scheduled to air in 2015.

According to an exclusive Entertainment Weekly report, "Once Upon a Time" Season 4 is currently focused on dad-casting for the second half of the season where the storyline on the "Queens of Darkness" will play out. It has been previously revealed that "Oz" actor Ernie Hudson will portray King Poseidon, Ursula's (Merrin Dungey) father, in "Once Upon a Time" Season 4.

French-Scottish actor Sebastian Roché, who is known for portraying "The Destroyer" Mikael Mikaelson in "The Vampire Diaries" and "The Originals," will appear as the "Sleeping Beauty" character King Stefan that has a complicated history with Maleficent (Kristin Bauer van Straten), one of the "Queens of Darkness."

However, the report claimed that Sebastian Roché's guest appearance in "Once Upon a Time" Season 4 could be on one episode only. The "Supernatural" and "General Hospital" actor will join the other OUAT cast members set to appear on the second half of season 4 such as Merrin Dungey who portrays Ursula, Victoria Smurfit as Cruella de Vil, Kristin Bauer van Straten as Maleficent, Ernie Hudson as King Poseidon, JoAnna Garcia Swisher as Ariel and Eion Bailey as August/Pinocchio.

The second half of "Once Upon a Time" Season 4 will now focus on the characters from the Disney films "The Little Mermaid," "Sleeping Beauty" and "101 Dalmatians" following the "Frozen" storyline in the first half of the fairy tale drama series.

According to a Comic Book Resources report, the upcoming OUAT storyline will be on Maleficent teaming up with the other villains such as Ursula, Cruella de Vil and Rumpelstiltskin/Mr. Gold (Robert Carlyle) to secure their happy ending.

"Once Upon a Time" Season 4 is scheduled to return on March 1, 2015 at 8 p.m. ET on ABC. The brand new episode is titled "Darkness on the Edge of Town."

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Colin O'Donoghue: 'Once Upon A Time' Actor Talks About Captain Hook, Dogs And The Queens Of Darkness In Second Half Of Season 4 - [READ]

'Once Upon A Time' Season 4 Spoilers: Actor Ernie Hudson Cast As Ursula's Father King Poseidon - [READ]

'Once Upon a Time' Season 4 Spoilers: Actor Eion Bailey To Return As Pinocchio In Second Half Of Season 4 - [READ]