'Dark Knight Rises' Shooting: Chris Evans, Hayley Williams, Others Mourn Victims

Olivia Munn and Russell Simmons among stars taking to Twitter to express condolences for Colorado victims.

A night at the movies turned tragic when a masked gunman entered an Aurora, Colorado, midnight screening of "The Dark Knight Rises" on Friday (July 20) and [article id="1690065"]opened fire, killing 12[/article] and wounding approximately 50. It was shocking news to wake up to, and many in Hollywood took to Twitter to express their condolences for the victims and their families.

Actor Chris Evans — no stranger to superhero movies, having played Captain America in both "Captain America: The First Avenger"

and "The Avengers" — was clearly distraught by the tragedy.

"What the hell is happening?? my heart is completely shattered. all of my thoughts and prayers are with the people of aurora," he wrote.

Olivia Munn, whose film "Magic Mike" is also in theaters now, echoed Evans' sentiment. "My sincerest condolences to the victims and families in Colorado. So sad, so mindless," she tweeted.

"Glee" actor Harry Shum Jr. remembered those affected as well, writing, "My heart goes out to all the victims in Colorado. This is just insane."

Music's big names also chimed in on the social media site, offering their thoughts and prayers.

"Praying for the people of Aurora, Colorado," wrote hip-hop mogul Russell Simmons.

Paramore lead singer Hayley Williams also expressed her dismay over the tragedy, writing, "In shock reading about what happened at the theater in Aurora, CO... Could have been any of us. My heart is heavy for everyone affected."

Basketballer LeBron James had an even more visceral response to the news, tweeting, "Its just not fair that innocent people have to lose their lives over someone's selfish stupidity acts! My stomach is hurting over this."

Kelly Cutrone wondered what the ramifications of the shooting would be. "Do we need to go through metal detectors just to see a movie - What is happening to our society? Prayers to Colorado and the world," she wrote.

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