Ewan Gordon McGregor (pronounced /ˌjuːən məˈɡrɛɡər/; born 31 March 1971) is a Scottish actor, singer, and adventurer who has had success in mainstream, indie and art house films. He is perhaps best known for his role as Mark Renton in the 1996 film Trainspotting, his portrayal of the young Obi-Wan Kenobi in the Star Wars prequel trilogy, and his role as the romantic penniless writer Christian in the 2001 film Moulin Rouge!

In 2009, he appeared in the films I Love You Phillip Morris and Amelia, and portrayed the Camerlengo Patrick McKenna in the film adaption of Angels & Demons. Aside from his film work, McGregor has starred in theatre productions of Guys and Dolls. He also appeared in television series such as The Scarlet and the Black, Lipstick On Your Collar, Tales from the Crypt, and ER. He was ranked No. 36 in Empire magazine's "The Top 100 Movie Stars of All Time" list.

McGregor was born in the Perth Royal Infirmary, was brought up in the nearby small town of Crieff, and went to the independent fee-paying school Morrison's Academy. His mother, Carol Diane (née Lawson), is a teacher and school administrator, and his father, James Charles Stuart McGregor, is a physical education teacher. His mother is the sister of actor Denis Lawson, the sister-in-law of the late actress Sheila Gish, and the step-aunt of the late Lou Gish. McGregor attended Guildhall School of Music and Drama in 1988 to study drama. Six months before graduating, he won a leading role in Dennis Potter's six-part BBC series Lipstick on Your Collar, and has been working steadily ever since.