Since landing the biggest role of his short career in the hotly anticipated film "The Hunger Games," actor Liam Hemsworth said a few eager fans had thrown themselves at him.

"I've had a bunch of marriage proposals," he told "Nightline." "I think I actually said yes to a few by accident.  Just nerves.  I was like, 'Yeah, I will.  I will.  I don't know you, but I'll do it.'  So, it's been a little funny."

" The Hunger Games" began as a best-selling book trilogy among teenagers and young adults and grew into a pop culture sensation. The movie doesn't premiere until March 23, but already critics have given the film wide acclaim, with a 93 percent "fresh" rating on Rotten Tomatoes and only three negative reviews to date. Akin to the enormous hype over the "Harry Potter" and "Twilight" series, analysts are already anticipating that "Hunger Games" will break the record for the best U.S. premiere in March.

Hemsworth, a 22-year-old Australian heartthrob, plays  Gale Hawthorne, the best friend and hunting partner of  Katniss Everdeen in District 12 in the post-apocalyptic nation of Panem. While he said he was "proud"  and felt "fortunate" to be a part of the project, Hemsworth admitted that the new rush of fame has been a little daunting.

"It's kinda the part of the business that I'm not as comfortable with, or kind of familiar with, but it's really exciting.  I was like, 'Yeah, I will.  I will.  I don't know you, but I'll do it.  So, it's been a little funny," he said.

In the film, Katniss is chosen to battle to the death in the annual Hunger Games, a fierce, televised government-sanctioned event. She is forced to say goodbye to Gale, Hemsworth's character, who promises her he will take care of her family, not matter what the outcome of the games. In short, it's not a romantic movie.

"My character - I envied him. I thought he was extremely courageous in what he was doing, you know, at a very young age," Hemsworth said. "It's not a prediction of the future, but it's a very extreme idea of a future that's gone very wrong in a lot of ways."

If he were to have to fight in the real Hunger Games, Hemsworth said he has some natural skills he could bring to the competition.

"I was always a really fast runner in high school," Hemsworth said. "I used to do 100 meter sprints,  and I feel like that'd probably be a pretty good skill to have in the arena, just run the entire time."

ABC News' Lauren Sher contributed to this report.