Zac Efron; Miley Cyrus

Strictly as an outside observer, I'm always surprised / perplexed by teen sensations making the leap to the big screen. The latest examples are Miley Cyrus and Zac Efron. Are they really movie stars already? Or are they beloved by millions simply because of the character(s) they've played?

When Cinematical's Dawn Taylor recently expressed her horror at the idea that Cyrus, a "marginally talented, pudding-faced 'tween idol," would be starring in a movie written by Nicholas Sparks, commenters were divided between hating Miley and hating Dawn. Nick Schager's review of Hannah Montana: The Movie was quite negative ("enduring the film is akin to being drawn and quartered"), but fans had clearly already decided to flock to theaters no matter what the reviews said. The narrative follow-up to the 3-D Hannah Montana/Miley Cyrus: Best of Both Worlds Concert Tour proves, if nothing else, that 'tweens love Hannah Montana. But do they love the actress who plays her enough to follow her in other roles?

Efron has been making an effort to demonstrate his range beyond the High School Musical movies. He took on a dramatic role in Richard Linklater's yet to be released Me and Orson Welles, decided not to dance in Footloose, and stars in the comedy 17 Again, which opens on Friday. Is he a deft comic actor? I don't know. I missed Saturday Night Live, which he hosted last weekend, and the recent Pool Party video was not very funny. He became beloved for his singing, dancing, and romancing, but will his fans follow him to comedic and dramatic roles?

Do Zac Efron and/or Miley Cyrus have what it takes to be movie stars? Take our poll and let us know.