The E4 comedy-drama was picked up for a second run in October last year.
The 2012 episodes will introduce three new regular characters, Mac (Tom Austen), Hope (Emer Kenny) and PJ (Scarlett Alice Johnson).
Charming sports star Mac - played by The Borgias star Austen - will join the show as the new husband of Rachael (Kristen Gutoskie), devastating A-Rab (Arsher Ali).
EastEnders and Pramface actress Kenny will play Hope, who becomes obsessed with A-Rab. Described as "ditzy" but also "slightly unhinged" and "utterly ruthless" when it comes to getting what she wants, Hope quickly develops a secret jealous obsession with Rachael.
Johnson (Pramface, Adulthood) will play PJ - full name Pamela Jefferson Junior - the daughter of Bobby (Todd Boyce) and Pam (Alison Doody).
Sarcastic, confident and "constantly on the look-out for new adventures", PJ will share a tense relationship with camp lothario Flynn (Samuel Robertson).
Beaver Falls series two will air on E4 later this year.
> Emer Kenny talks EastEnders, Beaver Falls, Pramface
Watch the Beaver Falls series two wrap video below (Warning: Contains strong language):