(Cover) - EN Showbiz - Zo Kravitz and Michael Fassbender are enjoying a "low-key" romance.

The pair met on the set of new movie X-Men: First Class and have been inseparable since last year. However, both Zo and Michael are keen to keep their relationship out of the public eye and are rarely seen together. In an unusual display of public affection, the couple were spotted in New York's West Village over the weekend and it has been reported they couldn't keep their hands off each other.

"They're really low-key, but they have a great time together just talking music or movies," a source told Us Weekly. "They really didn't want to be a topic of conversation during the press for X-Men."

Before enjoying their romantic stroll on Sunday, Zo and Michael joined a group of friends for a laidback brunch.

Zo, 22, and 34-year-old Michael are going strong despite the 12-year age difference. Even though Michael is older than Zoe the child of Lenny Kravitz and Lisa Bonet - it has been reported she is wise beyond her years and is a source of constant support.

"Zo's really mature for her age in that she has very strong opinions and she is very confident in herself. Most people are shocked to learn she's so young; she doesn't really bring it up and age would never stop her from dating anybody," the source added. "For how good looking and smart he is, Michael's pretty shy. She is actually the one taking care of him most the time. She really respects his talent." (C) Cover Media