2009 has become the highest-grossing summer ever at the domestic box office, according to Variety.com.

Through August. 30, summer box office revenues were $4.17 billion, compared to $4.16 billion for summer 2007, the previous record holder. Labor Day weekend should add another $100 million or more to the total tally, meaning the summer would be up at least 3 percent in grosses over 2007.

The heavy hitters? "Transformers: Revenge of the Fallen" ($399.4 million), "Harry Potter and the Half-Blood Prince" ($294.3 million) and "Up" ($289.6 million).

Films that performed significantly better than expected include "The Hangover," which made $270.2 million in domestic ticket sales. The Sandra Bullock-Ryan Reynolds romantic comedy "The Proposal" earned $160.2 million.

In addition, "Star Trek" grossed $256.7 million, while "X-Men Origins: Wolverine" grossed $179 million. "Ice Age: Dawn of the Dinosaurs" made $193.3 million and "Night at the Museum: Battle of the Smithsonian" grossed $176.5 million.

"Angels and Demons" rounds out the top 10 list at $133.4 million, but "G.I. Joe: The Rise of Cobra" will likely overtake "Angels."

Image © Paramount Pictures