On Friday, 129 civilians lost their lives during a calculated attack on Paris, which included suicide bombings and shootings.
The entire global community came to a standstill as horror and fear gripped the world.
In the immediate moments following the attacks, many took to social media to express their shock and sorrow over what had just occurred, including many members of the global sports community.
From FC Barcelona to the Denver Broncos, numerous organizations tweeted and posted to convey sadness and show support for the victims and their families.
From English soccer matches to NFL games, there were moving tributes of all manner.
Here's how teams, athletes and fans from around the world responded to the #ParisAttacks.
LeBron James played basketball Friday night, but not without thinking about the victims and their families in Paris.
French soccer player Lassana Diarra lost his cousin in the Paris attacks.
The no. 1 men's tennis player in the world couldn't come to grips with what occurred.
The world's fastest man was quick to offer condolences for those lost in the attacks.
The Rock posted a video telling the people of Paris to stay strong in this difficult time.
Cristiano Ronaldo showed how the world is standing with Paris in the aftermath of the horror.
Soccer fans sang "La Marseillaise" to show solidarity with Paris.
Kobe Bryant called for peace and prayer in the wake of the attacks.
FC Barcelona showed they stand with Paris.
With heavy hearts, Paris' biggest soccer team tweeted support for the victims and their families.
The NFL had a moment of silence before each game on Sunday.
And England's Football League did the same throughout the weekend.
Army football took to the field on Saturday carrying the French flag.
And French F1 driver Romain Grosjean raced with a heavy heart in Brazil this weekend.
French NBA player Kevin Séraphin showed his support for Paris with a special haircut.
The New York Rangers held a moving moment of silence for the victims.
On Saturday, ASU football fans had one eye on their team and the other on Paris.
Italy and AC Milan striker Mario Balotelli tried to make sense of the madness.
French football legend Thierry Henry could barely believe what happened on Friday.
And the Seahawks and Cardinals paid a moving tribute to the Paris victims during Sunday Night Football.