Developed the pin screen animation technique with his wife and
collaborator, Claire Parker.
He is the grandfather of filmmaker Alexandre Rockwell and mentored him during his
teen years.
His father was a military attaché in Constantinople, where Alexeieff
spent his early childhood years.
He was a military cadet during the Russian Revolution.
Educated in Paris in the 1920's, where he studied painting, theatrical set design and book illustration. In addition to his work with animation in film, he has also been latterly active in advertising.