ABC's Once Upon a Time is enlisting in characters from medieval times for its upcoming fifth season.

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Fans of Camelot will be pleased to learn that legendary characters Merlin, King Arthur and Guinevere will be introduced in season 5, according to a new TVLine report.

The report has info on what OUAT producers are looking for in the three iconic characters.

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To play the role of Merlin, Once Upon a Time producers are hoping for a black British actor in his 30s or 40s. Merlin is "a man with great wisdom and intelligence beyond his years," who is invested in the idea of duty.

For Arthur, they are looking for another British actor in his 30s or 40s. In OUAT, Arthur is "good and just ruler" though he is "a master manipulator who can carry a grudge to the grave, and maybe beyond." Arthur will have an "eternal burning love" for Guinevere.

As for Guinevere, producers are hoping for a Latina actress in her 20s or 30s. Guinevere is a "headstrong queen" who happened to fall in love with Lancelot (Sinqua Walls). Her conflict involves finding a common ground for her own personal happiness as well as Camelot's ability to thrive.

The report states that all three characters will have recurring roles in season 5. Merlin obviously has a very important role in the new season, considering he is the only character capable of saving Emma from the dark side.

Once Upon a Time season 5 airs in the fall Sundays at 8 p.m. ET/PT on ABC.

Tags: Once Upon A Time television ABC