Hard to believe that Robert Redford is 77. The celebrated actor/director was the special guest at this year’s Middlesex Community College Celebrity Forum, held Wednesday night at Lowell Memorial Auditorium. Redford, who won an Academy Award in 1981 for his direction of “Ordinary People,” was interviewed by MCC’s Patrick Cook. The talk was originally scheduled for June 20, but Redford was busy shooting his new movie, “A Walk in the Woods.”Names can be reached at firstname.lastname@example.org. Follow Mark Shanahan on Twitter @MarkAShanahan. Follow Meredith Goldstein on Twitter @MeredithGoldste.