Colin Hanks posted this adorable pic of his famous family enjoying the final nail-biter between the US and Belgium.
In typical emo fashion, Pete Wentz uploaded a contemplative shot before the game.
InStyle posted this pic of their cover girl, Kate Hudson, taking in the USA game.
Josh Duhamel posted this incredibly adorable pic of himself and son Axl Jack wearing matching Team USA jerseys.
Arnold Schwarzenegger may be Austrian-born, but he is supporting the red, white, and blue.
Model Alessandra Ambrosio is Brazilian, so obviously you know she's supporting her home country as it hosts the big event.
Ditto for Brazilian Gisele Bundchen, who posted this pic of herself glued to the TV during a game.
"Come on Aussies!" Hugh Jackman wrote while rocking his home uniform.
Jennifer Lopez performed at the opening ceremony and posted this spangly pic.
As did her duet partner, Pit Bull.
Joe Jonas is the most adorable fan to watch with.
Matt Lauer showed off his personalized jersey.
Michael Phelps has got one, too. How can we get our hands on one!
The Ireland team didn't qualify for the 2014 World Cup, so One Direction's Niall Horan is forgiven for cheering for Brazil.
"Even georgia wants to suit up," Ryan Seacrest said of his spirited puppy.
"Fight on USA!" Sarah Hyland said alongside a photo of herself and boyfriend Matt Prokop in their USA gear.
Run, Shakira! The singer showed her Colombian pride.
Swizz Beatz works with World Cup sponsor Hublot, so naturally he posted his very special vantage point for a game.