Marc Malkin Senior Film Awards, Events & Lifestyle EditorMorfydd Clark was at the Toronto Film Festival promoting “The Personal History of David Copperfield” when she was told she was cast as Galadriel in the upcoming Amazon series “The Lord of the Rings: The Rings of Power.”“I found out and then I went to a screening and Q&A for ‘David Copperfield,” Clark told me Monday night at the “Rings of Power” premiere at Culver Studios. “I suddenly realized what a big deal it was for me, and I passed out during the Q&A. I was caught by a lovely security guard.”Set thousands of years before the “Lord of the Rings” films, Clark plays the same character portrayed by Cate Blanchett on the big screen.“I knew I was auditioning for an elf but I didn’t know which one,” Clark recalled.