The 34-year-old's mother and sister also were injured in the Sunday attack, authorities said.
The triple knife attack occurred late Sunday night in West Hollywood, officials said.
A suspect is in custody, deputies said.
A look at a few of this week's police, fire and courtroom incidents near West Hollywood.
A West Hollywood man was sentenced for killing his girlfriend, draining her body of all blood in a crime that mirrored a book he co-wrote.
The 65-year-old was found lying in the street after an argument with another man.
After spending more than three years behind bars, a man was acquitted on charges of starting a fire in West Hollywood that left one dead.
Investigators are uncertain if the man's death was a suicide, homicide or accidental.
Detectives are still trying to determine whether the victim’s death was intentional, accidental, or criminal, authorities said.
The actress said the car burst into flames "out of the blue" while her husband, director Michael Morris, was driving in West Hollywood.
Just three weeks after she gave birth to her daughter, the woman's body was found mangled and drained of blood in her West Hollywood condo.
A retired LA County lieutenant said he'd conduct inspections of the parlors but is accused of paying for sex, the criminal complaint said.
Recognize this man who sucker punched another man at West Hollywood Best Buy before running off with his cellphone?
Tangled balloons got tied up in some power lines causing a transformer to explode and knocking out power to 150 customers in West Hollywood.
The name of the California police officers who died while pursuing a suspect will be called during the National Police Officers Memorial.
Authorities allege the man presented falsified documents in a registered nurse's name to secure a job with a travel nursing company.
The injured person was taken to a hospital for treatment, but the severity of their injuries is unknown.
A German national behind a spree of 40 fires in less than a week in and around West Hollywood was sane at the time, jury finds.
The attack occurred a little before 1:15 a.m in the 7100 block of Santa Monica Boulevard.
Police arrested an alleged serial rapist they say posed as a rideshare driver to hunt victims in West Hollywood and across LA.
The incident was reported about 4:30 a.m. at 8277 West Fountain Ave.
A look at a few of this week's most interesting police, fire and courtroom incidents near West Hollywood.