Board Thread:Spoilers!/@comment-24674051-20160625215037/@comment-27060727-20160715201722

Giles Mathey cast as Morpheus http://www.ew.com/article/2016/07/15/once-upon-time-giles-matthey-morpheus#.V4lDWrDfp4w.facebook

The article also mentions that they are hearing that Morpheus will be interacting with Belle and Rumple.