Spencer Pratt vs. Mary-Kate Olsen: It’s On!

In this corner, wearing a smug look of self-satisfaction, Hills breakout Spencer Pratt! And in this corner, weighing in at an estimated 53 pounds, Mary-Kate Olsen!

The public spat between Pratt and Olsen is shaping into a juicy hatefest.

The volley of blows started when Mary-Kate appeared on the Late Show with David Letterman and characterized old high school soccer teammate Pratt as an ill-tempered brat. Ever quick-witted, Pratt responded by calling Mary-Kate the “less cute” Olsen.

But as People notes, theirs is a long-running beef.

In a 2007 interview with Details, Pratt gloated he made $50,000 back in his school days by hawking a photo of M.K. knocking back booze.

This rivalry of the celebrity titans will surely be resolved in a conclusive, possibly bloody manner. Which combatant will survive?

On one hand, Pratt is notoriously well armed.

On the other hand, Mary-Kate has her hypnotic stare of death, with which she mesmerizes foes before devouring them in their spellbound state.

Besides, anybody who’s made out with Ben Kingsley is clearly capable of withstanding anything.