Ashley Greene -- Inconsolable After Condo Fire

Cradling her dog's dead body, "Twilight" star Ashley Greene was utterly heartbroken at her West Hollywood condo this afternoon ... after the whole place went up in flames.

TMZ broke the story ... the fire pretty much destroyed the condo and one of the actress' two dogs perished in the blaze. Ashley can be seen holding the dog's body in the video, wrapped in a sheet.

As we reported, Ashley was home at the time with her boyfriend and brother when the fire broke out on the living room sofa. They were sleeping at the time, and quickly evacuated before anyone was hurt.

Once they realized Ashley's dogs were still inside, the two boys rushed back to save them ... but couldn't. One dog died, the other is expected to be taken to Animal Control to be checked out.