Steelers' JuJu Smith-Schuster Gets Driver's License at 20 Years Old

Big day for Pittsburgh Steelers WR JuJu Smith-Schuster ... the 20-year-old is FINALLY licensed to drive a car.

For some reason, the NFL rookie never got around to getting his license when he was 16 ... and had been using a bike (which was recently stolen) to get back and forth to the Steelers training facility.

UNTIL NOW!!

JuJu hooked up with the Rogers School of Driving in Pittsburgh -- and trained up to get behind the wheel. He tweeted, "Your boy finally did it ... just got my license!"

Just make sure you get a car with an alarm system ... okay JuJu??