Michael Fassbender dating 12 years a slave co-star Lupita Nyong'o?

Actor Michael Fassbender is reportedly dating his '12 Years A Slave' co-star Lupita Nyong'o.[caption id="attachment_1421617" align="alignleft" width="380"] The cast of 12 years a slave after winning the Oscar for best film: AP[/caption]Fassbender, 36, is said to have been romancing his co-star on and off in recent months but he is now keen to show her he is serious about their relationship, reported Contactmusic."They have an incredible connection after the whirlwind of filming '12 Years A Slave' and then promoting it together. In September during the Toronto Film Festival they had a brief romance. Now Michael is intent on showing her he wants to get serious again and made a point of bringing his mum Adele to the Oscars rather than a date."Lupita's the most in-demand woman in the world at the moment so it will be hard to make it work but their chemistry is undeniable," a source said.Fassbender was previously in a relationship with Gerard Butler's ex-girlfriend Madalina Ghenea.PTI