Buff 'Twilight' actor Kellan Lutz has broken up with his girlfriend of two years, Australian actress Sharni Vinson.

The couple started dating back in July of 2011 after meeting during a reading for the film 'Step Up 3D.' Even though Vinson was cast and Lutz wasn't, Us Weekly reports they still had a whole lotta chemistry -- and that's what sparked the eventual relationship.

Said Lutz of his lady love in happier times, "She's a happy person, which really just clicks with me. It's just great to have someone you can smile with all the time. It's really special."

Even though the 'Twilight' flicks are now in the rear-view, the in-shape actor is keeping busy -- he voices the titular character in the upcoming animated movie 'Tarzan,' and he also stars with Amber Heard and Brittany Snow in the film 'Syrup,' which hits theaters next month.