Bruce Willis' co-star and director from one of his biggest (and most surprising) hits, The Sixth Sense, are showing their support for the actor on social media.The 67-year-old actor announced on Wednesday, through his daughter Rumer's Instagram, that he was diagnosed with aphasia, a condition which affects his cognitive functions, and that he is retiring.Both Willis' co-star Haley Joel Osment, who was just 11 when The Sixth Sense was released in 1999, and director M. Night Shyamalan, took to social media to pay tribute to the actor.