Rolling Stone
"An animated funhouse that delivers on its title and ups its scary-comic impact....There's enough merry mischief here to satisfy..." 04/02/2009Los Angeles Times
"The clean lines of the film's 1950s retro look work well with the uncluttered, straightforward tale, and the filmmakers' nod to the era's B-movies is a nice one." 03/27/2009 USA Today
3 stars out of 4 -- "Dazzling colors, winning characters and energetic visual effects all work in concert....Witty dialogue enhances the lively story." 03/27/2009 Washington Post
"MONSTERS VS. ALIENS has bells and whistles, superb technical sophistication and dazzling visual effects, sound, fury, and Reese Witherspoon..." 03/27/2009 Hollywood Reporter
"Directors Rob Letterman and Conrad Vernon have created a clever entertainment that with its onscreen battles and old movie references spans several generations of moviegoing." 03/22/2009 Variety
"[T]his why-didn't-anyone-think-of-this-before dust-up involving one-of-a-kind mutants and space invaders boasts sufficient jokes and eye-popping action..." 03/20/2009 Premiere
3 stars out of 4 -- "Looks like DreamWorks finally figured out that when you have a good script, a great voice cast and fun characters, you will have a great movie on your hands. This is a pleasure to watch for everyone." 03/26/2009 A.V. Club
"Stephen Colbert gets in some laugh-worthy deliveries....The banter between the monsters, Ginormica included, is generally clever and snappy..." 03/26/2009 | 
