The Texas Department of Transportation Friday unveiled its star-studded 20th anniversary anti-litter campaign along with a new slogan: "Real Texans Don't Litter."
"There aren't many things that are universally cool, and it's cool not to litter. I'd never do it," McConaughey said in Transportation Department news release.
The late blues guitarist Stevie Ray Vaughan was the first celebrity to warn "Don't Mess with Texas" when the campaign debuted during the 1986 Cotton Bowl.
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