Cohn & Wolfe has picked up Sonic Corp., the country’s biggest chain of drive-in restaurants.

sonicFounded in 1953 as Top Hat Drive-in, Oklahoma-based Sonic has more than 3,500 units.

The WPP unit will handle PR, cause/local marketing, issues management and social media strategy. It will service the business from Austin.

Patrick Lenow, VP-PR at Sonic, said C&W won the account due to its relevant quick service restaurant/retail savvy, fresh thinking and quick-turn agility.

Joanne Davis Consulting handled the review.

Sonic has worked with Kansas City-based Crossroads for PR, as well as its former advertising AOR Barkley.