"Sherlock" stars Martin Freeman and Amanda Abbington have officially broken up last March. However, as they play an on-screen couple on the show, things start to get quite weird.

Amanda plays Mary Morstan on the hit BBC show "Sherlock." Her character was first introduced in the episode "The Empty Hearse." Mary would then mary Dr. John Watson who is played by Martin.

Actors Martin and Amanda has been a couple for sixteen years, with two kids from their relationship. The couple had attempted to keep the news private, as their breakup was amicable and no ill-will was between them.

An article from The Telegraph reports that the couple are still seeing each other regularly even after their separation. "Martin and I remain best friends and love each other, and it was entirely amicable," as Amanda remarks about their breakup.

Amanda attributes the breakup to the amount of time Martin spends abroad to film "The Hobbit" and the series "Fargo". Though they have been apart on other occasions, they stated that it has reached a point where they got used to it.

Martin and Amanda's scenes in Sherlock feels weird as their on-screen characters are to struggle with the new baby. Their careers have forced them to work with each other, though they still are good friends.

It was especially weird for the pair as they are revisiting how it was when they first got together as a couple. A Mirror Online article mentions that the pair usually questions whether their decision to work together was correct, but the pair would always come up with a "yes."

Though both parties are sad about the separation, there was no hostility between them. They remain best friends and still love each other, but they realized that their time together has ended.

Martin and Amanda will be seen as Mary and Watson in the BBC series "Sherlock". Episode 1 of Season 4 first aired on January 1 and features their characters struggling with their new baby.