can't take your eyes off someone/something
can't take your eyes off someone/somethingor
can't keep your eyes off someone/something
COMMON If you can't take your eyes off someone or something, or can't keep your eyes off them, you want to keep looking at them, usually because they are so beautiful. Anne looked so beautiful no one could take their eyes off her. I'd never seen a diamond that size and couldn't take my eyes off it. We just couldn't keep our eyes off each other from the first time we met.