• 'Game of Thrones' star Maisie Williams and Olivia Wilde attend the 2016 Tribeca Film Festival after party for 'The Devil And The Deep Blue Sea' sponsored by Sauza 901 at 1OAK on April 14, 2016 in New York City.

'Game of Thrones' star Maisie Williams and Olivia Wilde attend the 2016 Tribeca Film Festival after party for 'The Devil And The Deep Blue Sea' sponsored by Sauza 901 at 1OAK on April 14, 2016 in New York City. (Photo : Getty Images/Ilya S. Saveno)

Five police officers were killed and seven others were injured following shootings at a Black Lives Matter protest in Dallas on July 7, Thursday. "Vinyl" actress Olivia Wilde was one of the celebrities who took to Twitter to slam the sniper attack.

In "Vinyl," Wilde plays former actress and model Devon Finestra who was once part of Warhol's Factory scene and the wife of Richie Finestra (Bobby Cannavale). On June 22, HBO announced that the period drama series will not be renewed for a second season.

In 2014, Wilde starred in "Better Living Through Chemistry" with Ray Liotta, Sam Rockwell and Michelle Monaghan. The "Vinyl" actress played a trophy-wife customer who enters the life of a straight-laced pharmacist and takes him on a joyride involving sex, drugs and possibly murder.

Born in New York City, Wilde grew up in Washington, D.C., particularly in the Georgetown neighborhood. Her parents and several relatives are journalists and her older sister, Chloe Cockburn is a civil rights attorney in New York.

On July 8, Friday, Dallas Mayor Mike Rawlings confirmed what federal officials had told CNN that investigators determined Micah Xavier Johnson, 25, from Mesquite, Texas, was the lone shooter in the incident. The gunman is a military veteran who had served in Afghanistan.

"Through our investigation of some of the suspects, it's revealed to us that this was a well-planned, well-thought-out, evil tragedy by these suspects," the publication quoted Dallas police Chief David Brown as saying at a prayer rally Friday. It was considered the deadliest single incident for U.S. law enforcement since the Islamic terrorist group al-Qaeda's attacks on Sept. 11, 2001 in New York, Virginia and Pennsylvania.

The Dallas sniper attack made President Barack Obama decide to cut his trip to Europe short by one day. He plans to return on July 10, Sunday, from Spain so he can travel early next week to Dallas.

"Later in the week, at the White House, the President will continue the work to bring people together to support our police officers and communities," the White House said in a statement obtained by Washington Post. The statement said Obama wants to "find common ground by discussing policy ideas for addressing the persistent racial disparities in our criminal justice system."

Watch a clip about the Dallas sniper attack here: