“Westworld” is adding a new face to its Season 4 cast — “West Side Story” star Ariana DeBose.The actress, who picked up the Supporting Actress Oscar earlier this year, has joined the HBO show as a recurring guest star. No details were immediately available about her character.She’ll join returning cast members Evan Rachel Wood, Thandiwe Newton, Ed Harris, Jeffrey Wright, Tessa Thompson, Luke Hemsworth, Aaron Paul and Angela Sarafyan.