Margot Robbie raves over Billie Eilish

Margot Robbie has raved over "incredible" Billie Eilish's part in the Barbie movie.

The Barbie actress has given credit to Billie Eilish after she wrote the hit song What Was I Made For? for the acclaimed movie.

"She's incredible and such a gorgeous person," Margot told Extra's Melvin Robert. "She is everything she seems to be and more."

Billie, who wrote the song with her brother Finneas after production had wrapped on the movie, gushed about Margot too.

"We saw it and then we wrote the song... I felt like I was physically connected to Margot after watching that," she said.

The two women finally met at the Met Gala last year.

"I was like, 'Margot, dude, what the hell, you're amazing.'" said Billie.

Billie admitted she knew pretty quickly the song would be a hit. "I feel like the night that we wrote that song, we were both like, 'Alright, we're doing something'... It felt really good immediately."