Kyra Sedgwick leads the cast of The Closer in a new PSA for GLSEN.

The Gay, Lesbian and Straight Education Network (GLSEN), which works to combat anti-gay behavior and bias in schools, recruited the crime fighters to help pitch its Safe Space Campaign, which aims to place a GLSEN Safe Space Kit in every middle and high school in the country.

“On my show, The Closer, we get confessions everyday, so I'm going to make one,” Sedgwick, who plays Deputy Chief Brenda Leigh Johnson on the TNT crime drama, says in the video. “Until recently, I didn't know that nine out of ten gay kids report being bullied at school.”

The Safe Space Kit “provides a teacher with the tools to fight bullying,” openly gay actor Phillip P. Keene, who plays technology expert Buzz Watson on the show, says.

The video ends with Sedgwick saying, “And to the bullies out there, I have my eye on you,” followed by a chorus from the entire cast: “So, knock it off.” (The video is embedded in the right panel of this page.)

Other celebrities involved in the campaign include the cast of ABC's Modern Family, Fort Worth Councilman Joel Burns and country music star Chely Wright.