Who are the top three stars (protagonists) in the 2012 film "This Means War"?

In the 2012 film "This Means War", an American romantic comedy spy film, it stars Reese Witherspoon, Chris Pine, and Tom Hardy as protagonists. The plot concerns two top CIA spies, Franklin "FDR" Foster and Tuck Hansen. Respectively, Chris Pine ("Star Trek") and Tom Hardy ("Inception") are two guys who are best friends and find their enduring friendship put to the ultimate test when they discover that they are both dating the same woman. They will then engage in an all-out war to win the affections of their beautiful love interest Lauren Scott (Reese Witherspoon).

Chelsea Handler and Til Schweiger are co-stars in this comedy, co-written by Simon Kinberg ("Sherlock Holmes") and Timothy Dowling ("Role Models") and directed by McG ("Charlie's Angels", "Terminator Salvation"). The film's storyline is based on ideas from Dowling and Marcus Gautesen. "The film that was finally produced by Robert Simonds, James Lassiter, Will Smith, and Kinberg. 20th Century Studios, Inc. distributed the film starting in February 2012.