NBC’s “Dracula” drama series is starting to take shape, adding two key players to its cast.

The Hollywood Reporter writes that “Merlin’s” Katie McGrath and “Game of Thrones'” Nonso Anozie, pictured, have joined the 10-episode drama as series regulars.

The series, which bypassed the traditional pilot stage, takes place in the 1890s and finds Dracula (“The Tudors'” Jonathan Rhys Meyers) living a double life in London as an American businessman interested in bringing modern science to Victorian society. But his true plan — to exact revenge on those who burdened him centuries ago — is derailed when he falls in love with Mina (Arrow’s Jessica DeGouw), who seems to be a reincarnation of his dead wife.

McGrath will play Lucy Westenra, Aristocratic London’s sexy, social butterfly with a penchant for gossip, flirting and all things glamorous. She’s Mina’s best friend, who eventually becomes tied up in a web of lies, lust and temptation that challenges their relationship. Anozie will play R.M. Renfield, Alan Grayson’s (aka Dracula) loyal confidante, who’s the keeper of Dracula’s secrets and the stabilizing force that allows his two personas to co-exist.

“Dracula,” a co-production from British Sky Broadcasting, Carnival Films & Television, Flame Ventures and NBCUniversal, hails from Tony Krantz (“24,” “Sports Night”) and former HBO Films president Colin Callender and writer-creator Cole Haddon (who will co-exec produce).

NBC is eyeing Dracula for fall 2013.