WATCH: Pauley Perrette Sings for Trevor Project

Longtime LGBT ally Pauley Perrette is promoting the Trevor Project with a music video for her new song "Beautiful Child."

Perrette, star of NCIS, premiered the video Friday on Entertainment Tonight. "The 'Beautiful Child' video is for saving lives," she told ET's Kevin Frazier. "It's to inform young kids out there -- especially the LGBT kids, which are four times more likely to commit suicide -- to let them know that there is a resource out there and that resource is the Trevor Project." The Trevor Project provides crisis intervention and suicide prevention services to LGBT and questioning young people.

Perrette was inspired to write the song after learning that the brother of a friend had committed suicide, she told Frazier. She's going to release an album, but she wanted to get "Beautiful Child" out as soon as possible, she said. "The whole point is to get more people and more people aware and to save lives," she explained.

Several other celebrities join her in the video, including NCIS costar Michael Weatherly and two out stars, Kirsten Vangsness of Criminal Minds and singer Lance Bass. Watch below.