'The Mule' Trailer: Clint Eastwood Plays Real-Life Drug Courier

The cast also features Bradley Cooper and Michael Pena.

The first trailer for Warner Bros.' The Mule has been released, featuring Clint Eastwood as a drug mule.

Eastwood also produced and directed the movie, which is based on the story of real-life drug courier, Leo Sharp, a World War II veteran who smuggled cocaine for Mexico's Sinaloa cartel, beginning in his late 80s. Sharp, who died in 2016, became known as the oldest and one of the most prolific drug mules.

The trailer opens with Eastwood's character, Earl Stone, on the side of the road frantically unzipping a duffel bag filled with cocaine in the back of his truck. As a sheriff pulls up and asks if he needs any help, he stalls.

"I'm delivering pecans to my niece. … She makes the worst pecan pie you've ever tasted," he says nervously before the sheriff's barking K-9 seemingly gives him up.

The trailer depicts the conflict between Stone's familial and financial responsibilities. Though he proves himself to be a proficient smuggler, he faces a new threat: the DEA.

"Family's the most important thing," Eastwood's character says in voiceover. "Don't do what I did. I put work in front of family."

Bradley Cooper stars as Colin Bates, the DEA agent chasing him down, and Laurence Fishburne plays a special agent. The cast includes Oscar-winner Dianne Wiest as Stone's ex-wife and Michael Pena as an enforcer, who is seen scoping out the streets alongside Cooper's character in the trailer.

The Mule will hit theaters Dec. 14.