The paranormal drama will return to BBC Three in the near future, with Michael Socha and Damien Molony joining the cast as series regulars.
In a new press release, Whithouse confirmed that Sherlock star and co-creator Mark Gatiss, Whitechapel's Alex Jennings and Teachers actor James Lance will also appear in the new run.
In addition, Harry Potter's Mark Williams will play a character named Regus, while Submarine star Craig Roberts will reprise his role as teen vampire Adam.
Case Histories actress Amanda Abbington, Benidorm's Selina Griffiths and Upstairs Downstairs star Ellie Kendrick will also appear in unspecified roles.
Whithouse has confirmed that Sinead Keenan will not return to Being Human, joining departing cast members Aidan Turner and Russell Tovey.
Being Human will return to BBC Three with fourth series premiere 'Eve Of The War'.
> Being Human Damien Molony hints at vampire romance
> Russell Tovey: 'I was ready to leave Being Human'
Take a look at images of the new Being Human cast below: