Almost six months after his former co-star and girlfriend [article id="1628612"]Brittany Murphy died unexpectedly[/article] at the age of 32, Ashton Kutcher says he still cannot make sense of her passing.

In his first in-depth public comments about Murphy's death, Kutcher told ABC's "Nightline," "I don't think you can [make sense of her death]. I don't know if you try to make sense of it or not. I just celebrate who she was. She was like the person who walked in the room and she was always, like, the first person to dance.

"You know when you go to a party and everybody is standing around and the music is going and, you know, sooner or later everyone is going to dance," he continued. "She was always the first person to dance. And I just try to connect to that and celebrate who she was and how she was and not make sense of it, 'cause there is no sense of making sense of it."

MTV News got an inside look at Kutcher and Murphy's relationship when we visited the [article id="1456029"]set of their 2003 film, "Just Married."[/article] "I learn something from that girl every day. She is a pro," he said. "She just brings it, man. She's really, really awesome. She makes me smile every day. She shows me something about my job every day. She's the best, man. I'll do anything with her, any movie, hands down."

But the couple eventually split and Murphy was long dogged by rumors of drug abuse and eating disorders. Her death in December 2009 was officially ruled a result of pneumonia. By that point, the former flames had largely lost touch.

"I mean, she came in, we were casting a TV show that we were producing, and I wanted her to play this role in it," Kutcher said. "And she came in, and I got to see her probably about two months before she passed away."