Up until recently, the actor had been happily loved-up with his actress girlfriend Nicole Behaire, who played the part of Marianne in the acclaimed movie Shame.
But she confirmed the news that they were no longer an item by posting a message on her Twitter page: "Yes, it's true. Fassbender and I are no longer dating."
Now that he's single, it's little wonder he hit the town with such vengeance during a trip to Dublin last month, spending nearly every weekend in Lillies Bordello.
When it comes to potential ladies, he says he finds confident and intelligent women most attractive.