And then she got on Twitter.
"So Scary, just got woken up to a guy trying to break into my house holding 2 big knifes," the hotel heiress Tweeted Tuesday morning.
"Cops are here arresting him."
Nathan Lee Parada, 31, nabbed outside Hilton's home about 6:42 a.m., was charged with felony burglary, police said.
"He was banging on her door and window in the backyard," Officer Bruce Borihanh told the Daily News.
"It's unclear whether he specifically targeted [Hilton] or it was a random act of burglary and he didn't know anybody was home."
Hilton saw the would-be intruder on a security camera and called police.
Parada has a criminal record. He was arrested in neighboring San Bernardino County last month after he allegedly used a hammer to break into a Kohl's department store and grab $14,000 worth of jewelry.
And he has mental problems, his family said.
"He has that mood problem - bipolar disorder. He's very quiet and we don't see him much," grandmother Angie Parada, 74, told The News.
Asked if her grandson had a fascination with Hilton, she said "No, I never heard anything about that."
Hilton's mom was blindsided by news when she arrived home from a trip early yesterday.
"Oh, my God, it's just amazing. Thank God she's okay," Kathy Hilton told The News. "I'm going up to check on her now. I'm very thankful to the police. Thank God that she saw this in time."
The "Simple Life" socialite was the victim of another home invasion when a suspect in a hooded sweatshirt ransacked her Sherman Oaks house in December 2008 and made off with an estimated $2 million haul. Hilton was out at the time.