AceShowbiz -

Although Dominic Monaghan and Matthew Fox shared screen on "Lost" for more than five seasons, they apparently are not good buddies in real life. In a reply to one of his Twitter followers, Dominic slams his former co-star.

Dominic flat-out accused Matthew of beating females. "He beats women. No thanks," so he wrote when the female fan pleaded him to give her regards to his former co-star, "holla at matthew fox and tell him to get a twitter i beg of you."

"I KNOW IT WAS WRONG BUT WHAT?! WHAT ABOUT ALL THOSE GOOD TIMES YOU HAD TOGETHER?!" she replied, to which he fired back, "How did you know we ever did?you don't know either of us.he beats women.not isolated incidents.often.not interested."

When another fan warned him that he could be sued for defamation, Dominic answered, "It's very difficult to sue someone for speaking the truth. Have you received an education dear?"

Matthew was sued by a female bus driver in August 2011. He was accused of hitting her in the breasts, arm, leg and groin areas when she refused to drive him to the Ritz-Carlton Hotel. He was arrested but was not charged due to lack of evidence.