Selena Gomez handles her "insane fame" with "such grace", says her movie co-star.

The 'Spring Breakers' star filmed upcoming comedy film 'Behaving Badly' with 18-year-old actor Nat Wolff.

The young breakout star says Gomez was a joy to work with.

Speaking to US Weekly, Wolff gushed: "Selena is such a big star on a level that I'd never been around At [the] time [we were filming], she was dating Justin Bieber, so it was insane, like, the amount of people who'd be around...but she handled it with such grace and had such focus as an actress.

He added: "If that ever happens to me, I have a good example in her of how to handle it."

Wolff insists superstardom isn't top of his priorities right now though.

He added: "I think because I live in New York and I still play basketball, and I still go to real high school, it's been easy for me to balance acting and music with just being a regular 18-year-old.

He continued: "A lot of young people who want to get into the business want to be famous, and it's good for what it is, but it's really transient, and it's not something to strive for. The work is the most important."