Miley Cyrus May Be Getting Close With Her 'So Undercover' Co-Star, But She And Liam Hemsworth Are 'Stronger Than Ever,' Says Insider!

Two years after falling in love on the set of 'Last Song,' Miley Cyrus and Liam Hemsworth are still holding strong, despite their differing shooting schedules and hot co-stars! HollywoodLife.com has all the exclusive details on their relationship! New photos of Miley Cyrus getting fun and flirty with her So Undercover co-star and on-screen love interest, Joshua Bowman, had us nervous something had gone wrong with her boyfriend, Liam Hemsworth. However, a friend of Miley's reassured us Miley and Liam are going strong and are "better than ever!"

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“Miley and Liam are used to having to deal with tour schedules and long distance filming. Whether she’s on tour, or he’s shooting a movie, they obviously love each other very much and make things work,” the insider told HollywoodLife.com exclusively. “They both understand it’s part of their careers and they get it.”

Josh, a 23-year-old English actor, and Miley, 18, look like they get along swimmingly — but Liam, 21, isn’t suspicious of anything going on between them.

“Liam isn’t worried about Miley or anyone she’s working with. He’s really confident, and I think she finds that sexy,” our source says. “They talk all the time and have a great relationship. I don’t see jealousy from either of them. They’re stronger than ever.”

Adds Miley’s friend, “Miley isn’t going to ruin the relationship with Liam by hooking up with one of her co-stars and she’s very trusting Liam will do the same. Liam’s a cool guy; he’s not going to ruin a good thing.”

We’re glad to hear Miley and Liam are happy as ever, and he’s not nervous about her hunky new co-star! Regardless of whether or not they are more than just co-stars, Miley and Josh seem to have awesome chemistry, which will only make So Undercover an even better movie. Are YOU excited to see it?

Reporting by Russ Weakland