" I was just thinking about her when I was publish it . She was come up , and she was younger than me , and nobody had ever been younger than me , " Billie added with a joke .

Billie Eilishrevealed that she wrote a song partially inspired byOlivia Rodrigo.

Of course, Olivia is just over a year younger than Billie and similarly hit huge success as a teenager. Olivia previouslydescribedBillie as “really sweet and supportive” when it came to industry advice.

Speaking to theLA Timesabout Olivia, Billie said, “I think everybody’s experiences are so individual.”

“Nobody has had anybody else’s life, you know? But I do feel a protectiveness over Olivia,” she continued.

“I have a song called ‘Goldwing’ from my last album that’s kind of about her. I’ve never said that to anyone. It’s not only about her. I was just thinking about her when I was writing it. She was coming up, and she was younger than me, and nobody had ever been younger than me,” Billie added with a laugh.

In case you’ve never heard the song “Goldwing,” it includes lyrics such as “Go home, don’t tell / Anyone what you are / You’re sacred and they’re starved / And their art is gettin' dark / And there you are to tear apart.”

“Olivia was getting big, and she was just, like, this little dainty child,” Billie continued. “I felt so nervous. I was worried about her. She came up in that acting world, and people are so weird. I don’t know — I just felt very protective over her. And I feel that way to everyone.” In fact, Billie added that Ariana Greenblatt — the teenager who plays Sasha inBarbie— is “16, and I literally want to cry about her sometimes.”

“I just see myself in all these young girls. And it’s the girls, man. Boys can handle themselves. They’re dudes — they don’t have to deal with it like we do,” Billie said. “I just want to hold everybody in a little glass box and never let anything touch them.”

You can read the full interview with Billiehere.

Closeup of Billie Eilish giving the peace sign

Closeup of Olivia Rodrigo on the red carpet

Closeup of Billie Eilish smiling

Closeup of Billie and Olivia

Olivia with Billie and another person

Screenshot of "Goldwing" lyrics

Closeup of Billie and Olivia surrounded by people at an event

Olivia Rodrigo