HOLLYWOOD, Calif. --
“Dexter” co-stars Michael C. Hall and Jennifer Carpenter are allegedly separating, Access Hollywood has learned exclusively.

A source tells Access that, according to a person very close to the production, the real life husband and wife, who play brother and sister Dexter & Deborah Morgan on the hit Showtime show, haven’t been getting along on set all season and that it’s widely known an official separation announcement is imminent.

In fact, Access’ source was told that Carpenter was going around the set talking about the couple’s problems during the course of the show’s production.

Additionally, our source was informed that Hall, Carpenter and the rest of the show’s cast are very worried about how the two of them are going to work as closely together on set next season as they’re usually required to do.

“Dexter” held its fifth season finale party in New York Sunday night –Carpenter was present, but Hall was not.

“Dexter’s” fifth season finale Sunday night attracted 2.9 million viewers, making it the series’ highest rated season yet. The show has averaged over 5 million viewers per week, across linear and on demand viewing. The show has already been picked up for a sixth season.

Hall and Carpenter married on December 31, 2008. Hall was previously married to Broadway actress Amy Spangler from 2002 to 2006.

Showtime had no comment on this report. Access has reached out to reps for Hall and Carpenter, but has not received comment back at this time.

EDIT: REP CONFIRMS IT. After nearly two years of marriage, Dexter stars Michael C. Hall, 39, and Jennifer Carpenter, 31, are getting a divorce. A joint exclusive statement to EW from their representatives read: “Having been separated for some time, Jennifer Carpenter and Michael C. Hall have filed for divorce.” Both reps add that the split was amicable. The couple — who met on the set of the Showtime drama, in which she plays his foster sister — married on December 31, 2008. Hall completed treatment for Hodgkin’s lymphoma earlier this year.