08/11/2009 at 03:00 PM EDT
Dwayne Johnson has battled wrestlers, spies and all manner of bad guys on screen. In real life, he's tackling an even more powerful foe: diabetes.
"Get outside. Play a game. Do something active together," urges the Race to Witch Mountain
star – who's just been named the new national ambassador for the Diabetes Aware
campaign – in a public service announcement that makes its debut on PEOPLE.com.
"We can make a difference in our own families through exercise, eating right and teaching healthy behaviors to our children," Johnson, 37, says in the PSA, sponsored by Novo Nordisk and the Entertainment Industry Foundation.
The campaign aims to reach the 24 million Americans living with diabetes, along with the estimated 6.2 million who are unaware they have the disease.
"I want to encourage families to be active and eat right," says Johnson, who is dad to 8-year-old daughter Simone Alexander. "Small steps can go a long way in managing diabetes, its complications, and raising healthy, active children."
The actor becomes the latest celebrity ambassador to join the Diabetes Aware program since it began in 2004. Past ambassadors include Halle Berry
, Cuba Gooding Jr. and Dustin Hoffman.