Nicole Kidman is bringing awareness to an important cause.

The Big Little Lies star stepped out Oct. 4 in her first public appearance since filing for divorce from husband Keith Urban, attending at an auction in Texas benefiting amfAR Dallas.

During the event, which raised money for HIV/AIDS research, the actress wore a black off-the-shoulder dress as she gave remarks before presenting Yellowstone creator Taylor Sheridan with the nonprofit’s Award of Inspiration.

“I think what Taylor recognizes, as we all do, is that we are all more alike than we are different, and that we’re better when we look out for each other,” she said in a video obtained by People. “That, of course, is why we’re here tonight. What better way to support, to elevate our common humanity, than to help fund bold and innovative research.”

Since filing for divorce from the “Long Hot Summer” singer Sept. 30, Nicole, 58, has kept a low profile. However, she did step out for a hike in Nashville with her sister Antonia Kidman, who appeared to listen intently as her big sis spoke emphatically, as seen in photos published by the Daily Mail Oct. 1.