Alexander Zivojinovich OC (b. August 27, 1953, Fernie, British Columbia), better known by his stage name Alex Lifeson, is a Canadian musician, best known as the guitarist of Rush. ( "Zivojinovich" in Serbian means "Son of Life", therefore becoming "Lifeson".

)The son of Serbian immigrants, Nenad & Melka Zivojinovich, Lifeson was raised in Toronto, Ontario. Lifeson plays guitar, plays the occasional bass pedals and composes for the rock group Rush. Lifeson's solo album, Victor, was released in 1996.

Outside of music, he owns and operates a small consumer-products design, engineering, and manufacturing firm The Omega Concern, as a gourmet chef is part owner of the Toronto restaurant The Orbit Room, and is a licensed aircraft pilot and motorcycle operator.

Along with his colleagues Geddy Lee and Neil Peart, Lifeson was made an Officer of the Order of Canada on May 9, 1996. The trio were the first rock musicians so honoured.