Aleksandar Živojinović , ( born August 27 , 1953 ) , better known by his stage name Alex Lifeson , is a Canadian musician , best known as the guitarist of the Canadian rock band Rush .
Alex Lifeson , OC ( born Aleksandar Živojinović ; August 27 , 1953 ) is a Canadian musician . He is best known as the guitarist and co-founder for the Canadian rock band Rush .