Ruthie Ann Miles (born April 21, 1983) is an American actress and singer best known for her roles in musical theatre. Off-Broadway, she has played Christmas Eve in Avenue Q and starred as Imelda Marcos in Here Lies Love, winning a Theatre World Award and a Lucille Lortel Award for the latter role. Miles is performing the role of Lady Thiang in the 2015–2016 Lincoln Center production of The King and I on Broadway, for which she won the 2015 Tony Award for Best Featured Actress in a Musical.
Miles was born in Arizona and raised by her Korean mother, Esther Wong, a music teacher, first in Korea and, from 2nd grade, in Honolulu, Hawaii. "I had to work very quickly and very hard to break my accent," Miles has said. She attended Kaimuki High School, graduating in 2001, and then Southern Oregon University before earning her bachelor's degree at Palm Beach Atlantic University in 2005. She received a master's at New York University. She is married to Jonathan Blumenstein and has a daughter, Abigail.
With the off-Broadway York Theatre, Miles appeared as Leah in Two by Two and Red Urchin in The Roar of the Greasepaint – The Smell of the Crowd. She played Christmas Eve and other characters in Avenue Q off-Broadway for two years beginning in 2011. For her starring role as Imelda Marcos in Here Lies Love, in 2013 off-Broadway at The Public Theatre, she won a Theatre World Award and a Lucille Lortel Award. Miles has appeared in national tours of Sweeney Todd (as Adolfo Pirelli) and Annie. She has played numerous roles in regional theatre and appeared as a doctor in the film I Am Michael.