Greta Kline (born March 21, 1994), better known by her stage name Frankie Cosmos, is an American musician and singer-songwriter. She is known for her independent releases, inspired by Frank O'Hara's poetry, DIY ethics of K Records and the early 2000s New York City's anti-folk scene.[1][2] She is the daughter of actor Kevin Kline and former actress Phoebe Cates.