Each episode sees three celebrities confess their wildest stories, in the show that scratches away at the squeaky clean reputations of some of the nation's favourite faces.
Mel Giedroyc said: "I am utterly thrilled to be taking to the Unforgivable dais once more... (I love the word "dais". It's almost as good as "plinth"). It's going to be an absolute cracker of a second series. I know that because I manifested it this morning. We'll be welcoming in a whole roster of deliciously naughty, mucky guests, and expect some big surprises coming out of our booth too...
She continued: "Sadly, we will be saying goodbye to the drone. Boring old Ofcom, eh? Just a word of explanation. For those viewers who have confused this series with the film "Unforgiven", much as I do have a lot in common with the story of an aging outlaw and killer who takes on one more job years after he'd turned to farming, I am Mel Giedroyc, a perimenopausal lady from Leatherhead, not Clint Eastwood, the multi-Oscar winning octogenarian hottie."
Comedian Lou Sanders returns as Mel's sinful sidekick. She said: "Cutie pops and sweetie pie back together at last - just like the nation demanded! Can't believe this series is going to be underwater - wait, unless that was a prank?"
Mel Giedroyc: Unforgivable launched earlier this year to a series average of 816k individuals and across the premiere eps the series profile averaged 25% 16-34 and 63% ABC1.
Hilary Rosen, UKTV deputy director of commissioning, said: "I'm absolutely delighted that we are going again with Unforgivable. The show was a big hit on Dave and we are excited that it will be returning with the irrepressible Mel at the helm and Lou below deck if she continues to misbehave."
Steve North, genre manager, comedy and entertainment, added: "We were so pleased with the first series success, from our viewers reaction and most recently a nomination for a National Television Award, so I'm thrilled it is coming back for a second series. I particularly loved hearing the guest's revealing stories every week and look forward to seeing who is brave enough to face Mel and Lou in series two."