“The Crown” star Emma Corrin and “The Power of the Dog” breakout Kodi Smit-McPhee have joined Cate Blanchett in a new West End adaptation of Anton Chekhov’s “The Seagull.” Corrin will play young actress Nina, while Smit-McPhee will portray Konstantin, the son of Blanchett’s Arkadina. Tom Burke was previously announced as Trigorin, Arkadina’s love interest. […]