Tim McGraw couldn’t be more proud of daughter Gracie as she shares news of her theater debut. The 27-year-old is set to star opposite Marisa Tomei and Arliss Howard in Babe, an off-Broadway play that officially opens on Nov. 20. Gracie McGraw is the oldest of Tim McGraw and Faith Hill‘s three daughters.She lives in New York City and has been pursuing an acting and singing career for several years.Her role in Babe might be one the country hitmaker has advice (or at least opinions) on.Related: Country Stars With Famous Family Members Per Broadway World, Babe follows two music producers, Abby and…