DreamWorks Animation’s “Monsters vs. Aliens” destroyed the competition this weekend with a $58.2 million debut, according to studio estimates Sunday. This makes it the biggest debut so far of 2009, taking out Watchmen’s $55.2 million debut earlier this month.

“Monsters vs. Aliens” was shown in 3D on 2,080 screens, while the rest of the 7,300 screens were traditional, non digital screens. DreamWorks Animation’s upcoming films, “How to Train Your Dragon” and “Shrek Goes Fourth,” will also be in 3D.