Kate Beckinsale, Theo James and Tobias Menzies are the confirmed cast members for Underworld 5 so far, and they'll now be joined by Lara Pulver. Sherlock's Irene Adler has signed up for the sequel - still listed on the IMDb as Underworld: Next Generation, although nobody else can quite believe it's called that.
It's far from Pulver's first brush with the undead, since she played Claudine for half a dozen episodes of True Blood a few years ago. She was also Sherlock's Irene Adler, Da Vinci's Demons' Clarice Orsini, and Karen Lord in Edge Of Tomorrow. Most recently she's been on stage in the Savoy Theatre's run of Gypsy, with Imelda Staunton.
Her role in the vampires-vs-lycans saga remains under wraps, since not much is known about the plot yet (although we know Menzies is a new werewolf leader). It's fairly natural to assume that it'll pick up from the end of Underworld: Awakening, where Beckinsale's Selene was still on the trail of the missing hybrid Michael. And as that "Next Generation" suggests, the word on the street is that the film will continue the handover to the younger cast members, like James' David.
Cory Goodman (The Last Witch Hunter) wrote the screenplay, said to be "expanding the mythology". Anna Foerster (Outlander) is the director, original Underworld mastermind Len Wiseman remains a producer, and shooting starts later this year in Prague, for a release in 2016.