Divorcing DEXTER stars MICHAEL C. HALL & JENNIFER CARPENTER are embroiled in a frigid cold war!
The former couple, who married in 2008 and split last year, are barely speaking to one another as they film the sixth season of the popular Showtime series.
“Dexter” stars  Michael, 40, as a Miami forensics ana­lyst by day/serial killer by night and  Jennifer, 31, plays his sister Deb.  They announced they were divorcing in December.
“They talk as little as possible while they are filming scenes together and then avoid each other like the plague the rest of the time,” disclosed an insider.
As The ENQUIRER first reported, Jennifer, who stood by Michael while he battled and recovered from Hodgkin’s lymphoma in 2009, couldn’t get over his refusal to start a family.
“They have a ton of un­resolved issues over their marriage, but they have noth­ing to say to each other at this point,” continued the insider.
“It seems as if Jennifer hasn’t forgiven Michael and she’s not making life on the set for him easy.”
“The caring sibling relation­ship viewers see on the screen is diametrically opposed to the bitter atmosphere between the former lovers when the cameras aren’t rolling,” added the source.
“It’s incredibly awk­ward for everyone.”
All the details are in the new ENQUIRER!