Miley Cyrus "Better Watch" Hunger Games, Says Liam Hemsworth

You'd think it was a given that Miley Cyrus already has plans to see Hunger Games.

But her boyfriend Liam Hemsworth, who stars in the highly-anticipated movie, admits he's not even sure if Cyrus is a fan of the young adult book franchise...

READ: Hunger Games' Josh Hutcherson Talks Readying for Sequel

"Well she didn't know about it until I got attached to it,"  Hemsworth told us last night at the launch party for Sony PlayStation's new PS Vita portable entertainment system in L.A. "And then she read the book. I hope she liked it. I don't even know. She better watch it!"

The 22-year-old Aussie actor echoed what his Hunger Games costar Josh Hutcherson told us about signing on for Games' possible two sequels.

"If it does as well as everyone's expecting it to do, then I imagine they'll go ahead," he said. "I love the books. The books are great ,so if we get to shoot all three films I'll be really happy."

Also on the horizon for Hemsworth is Expendables 2 opposite legendary action stars Arnold Schwarzenegger, Sylvester Stallone and Bruce Willis.

"It was pretty amazing," he dished. "I grew up watching all those guys and I remember just sitting on set the first day and I had this scene where I had a bunch of dialogue and it was just my character talking in front of all these guys... I was like, 'Oh my god. I'm sitting with some of my biggest action idols that I'd grown up watching and now I'm on set with these guys.' It was a real pinch-yourself moment."

CREDITS: E!