As expected, DreamWorks' animated newcomer 'How to Train Your Dragon' finally knocked Disney's 'Alice in Wonderland' from its perch atop the box office in its fourth week, in the year's first big head-to-head battle between 3-D movies.

'Dragon' debuted with an estimated $43.3 million, while 'Alice' lost half of last week's audience for a still strong $17.3 million (and a domestic total to date of $293.1 million) -- this on a weekend when many theater chains raised 3-D ticket prices by as much as 26 percent.

True, 'Dragon' didn't burn up the box office the way DreamWorks' 'Monsters vs. Aliens' did, opening with $59.3 million on the same weekend a year ago. Still, these results seemed to prove that two 3-D movies could prosper at the same time in an increasingly crowded 3-D marketplace, with not nearly enough 3-D auditoriums in the United States for traditional blockbuster-sized releases of more than one 3-D movie at a time. As expected, DreamWorks' animated newcomer 'How to Train Your Dragon' finally knocked Disney's 'Alice in Wonderland' from its perch atop the box office in its fourth week, in the year's first big head-to-head battle between 3-D movies.

'Dragon' debuted with an estimated $43.3 million, while 'Alice' lost half of last week's audience for a still strong $17.3 million (and a domestic total to date of $293.1 million) -- this on a weekend when many theater chains raised 3-D ticket prices by as much as 26 percent.

True, 'Dragon' didn't burn up the box office the way DreamWorks' 'Monsters vs. Aliens' did, opening with $59.3 million on the same weekend a year ago. Still, these results seem to prove that two 3-D movies could prosper at the same time in an increasingly crowded 3-D marketplace, with not nearly enough 3-D auditoriums in the United States for traditional blockbuster-sized releases of more than one 3-D movie at a time.

Even as theater owners race to equip more screens with 3-D projectors, the nation's 3-D resources will be strained even further next weekend when retrofitted 3-D release 'Clash of the Titans' elbows its way into contention.

Debuting in third place, and aiming for some of the same audience that made a hit of 'The Hangover' last year, was MGM's 'Hot Tub Time Machine,' getting its feet wet with $13.7 million. Down just 40 percent in its second week was Sony's 'The Bounty Hunter,' which took in $12.4 million worth of bounty for a fourth-place finish. (Its two-week total: just $38.8 million). Plunging 54 percent in its second week, Fox's 'Diary of a Wimpy Kid' finished fifth with an estimated $10 million, for a total of $35.8 million to date.

The Top 10:
1. 'How to Train Your Dragon,' $43.3 million
2. 'Alice in Wonderland,' $17.3 million
3. 'Hot Tub Time Machine,' $13.7 million
4. 'The Bounty Hunter,' $12.4 million
5. 'Diary of a Wimpy Kid,' $10.0 million
6. 'She's Out of My League,' $3.5 million
7. 'Green Zone,' $3.4 million
8. 'Shutter Island,' $3.2 million
9. 'Repo Men,' $3.0 million
10. 'Our Family Wedding,' $2.2 million