Daniel Radcliffe is gearing up for a new project: fatherhood. The “Harry Potter” star, 33, and longtime girlfriend Erin Darke, 38, are expecting their first child together, a representative for the actors confirmed Monday. The couple began dating in 2012 after meeting on the set of the 2013 film “Kill Your Darlings,” in which Radcliffe portrayed Beat Generation poet Allen Ginsberg and Darke ...