Sean Lennon is 49 years and 2 month(s) old. He was born in 9 Oct, 1975. Sean "Taro Ono" Lennon, better known as Sean Lennon, is an American singer/ musician who is the child of one of the Beatles, John Lennon, and his wife, Yoko Ono. He was born in New York on October 9, 1975 (his age is 39 years old), coincidentally his father's 35th birthday. He has a half-brother and a half-sister. After Sean's introduction to the world, John turned into a "house spouse," tending to his young child until John's homicide on December 8, 1980. Sean went to playschool in Tokyo and was instructed at the restrictive private live-in school Institute Le Rosey in Rolle, Switzerland, and at New York's private Ethical Culture Fieldston School and Dalton School. He went to Columbia University, where he studied only three semesters before quitting college education to concentrate on his music profession. Sean "Taro Ono" Lennon, better known as Sean Lennon, is Sean Lennon is an American singer, songwriter, musician, and actor and is the son of John Lennon and Yoko Ono. Sean was born in New York City on October 9, 1975, which was, coincidentally, his father's 35th birthday. He has a half-brother, Julian, and his godfather is Elton John. After Sean's introduction to the world, his father, John Lennon, became a "house spouse." John Lennon spent most of his time tending to Sean until John's untimely death by homicide on December 8, 1980. Sean went to playschool in Tokyo and was instructed at the restrictive private boarding school Institute Le Rosey in Rolle, Switzerland, and prior at New York's private Ethical Culture Fieldston School and Dalton School. In January 1984, when Steve Jobs was in Manhattan, he went to a gathering that Yoko was tossing for Sean, and Jobs gave him one of the first Macintosh computers. Sean attended Columbia University but studied only three semesters before dropping out to concentrate on his music.