The New York Minute actress, 19, began dating the Greek shipping heir in May (05) and introduced him to her friend Hilton.
In October (05), Niarchos dumped Olsen for Hilton, who had just called off her engagement to PARIS LATSIS.
In an interview with W magazine, Olsen admits she always liked Hilton and was shocked by recent events.
She says, "Paris and I always only had nice things to say about each other. Now I guess you can tell we're not talking.
"It's a hurtful and painful subject. I miss him and I love him, and I don't speak with him anymore."