"Guardians of the Galaxy" is the first film of 2014 to pass the $300 million mark domestically, according to estimates reported by Box Office Mojo. The film looks to finish third overall at the box office this weekend, with an $8 million take behind "Dolphin Tale" and new No. 1 "No Good Deed," which both opened Friday. The continued success of "Guardians" -- in its seventh weekend of release -- comes at a notably slow period at the box office, and with the summer blockbuster season officially cooled off.

2014's biggest earners thus far, according to Box Office Mojo, are dominated by genre films -- especially those featuring superheroes and toys. "Guardians" is joined at the top of the list with another Marvel Studios production, "Captain America: The Winter Soldier," which grossed $259.8 million domestically.

"The LEGO Movie" and "Transformers: Age of Extinction" follow at third and fourth place respectively, and "Maleficent," the new take on the "Sleeping Beauty" villain starring Angelina Jolie, rounds out this year's current top five domestic performers.

"Guardians of the Galaxy" has been roughly as successful in the overseas markets as it has been domestically, netting $305.6 in foreign box office compared to its $305.9 domestic take -- for a combined $611.5 worldwide total in 45 days of release.