June 4th, 2013
04:30 PM ET
One of the best moments in the trailer for Seth Rogen's "This Is the End" is the split second Emma Watson bursts into James Franco's house ... as herself ... carrying an ax.
The absurdity is exactly why it's so amusing - and also why Watson decided to go for Rogen's apocalyptic comedy, even though she's not particularly known for comedic work.
The movie, which Rogen co-wrote and co-directed with Evan Goldberg, takes a look at what would happen if celebrities playing "themselves" were suddenly facing the end of the world during a party at Franco's luxury digs. At first, the former "Harry Potter" star didn't see where she'd fit in.
"I just thought it was the most absurd, weird, crazy idea," Watson told CNN at the movie's premiere in Los Angeles Monday. "I remember my agent trying to explain it over the phone to me, and me just being like 'I can't... why me? Why me?' And also, just like, 'this is so bizarre.'"
But just hearing the plot description didn't do the plot justice. "When I read the script, I just found it hilarious, and I was like 'of course I will do this - this will be hysterical.'"
Luckily, her co-stars, which includes Rogen, Franco, Craig Robinson, Jay Baruchel, Danny McBride and Jonah Hill, could keep her laughing off-camera, too.
"I mean, they're all funny," the 23-year-old said. "And I don't really get the chance to be around comedians very much, so I think I particularly was super into it."
About this blog
Our daily cheat-sheet for breaking celebrity news, Hollywood buzz and your pop-culture obsessions.