Will Smith surprised an unsuspecting fan -- and then borrowed $10 from him

"I looked over on the other side and I saw a dude. He was, like, 36, and I was like, 'That dude is a Fresh Prince fan.' You can spot 'em!" Smith said, laughing. "So I kinda rolled the window down and after a couple of minutes, he was like, 'Will?'"

Relieved the fan had spotted him, the Oscar-nominated actor used the incident to his advantage.

"He said, 'Hey, man, can I get a picture?' I said, 'Yeah man, I need about $10,'" Smith said. And when he tried to get the guy's information to repay him, he wouldn't have it.

See photos of Will Smith through the years:

And though Smith's popularity helped him out of that tight spot, his new facial hair is not doing him any favors at home. The Fresh Prince star admitted that his wife, Jada Pinkett Smith, is not a fan of his new mustache, which he is growing out for a project.

WATCH: EXCLUSIVE: Will Smith Jokes He Might Have Been 'Irritating' 20 Years Ago on 'Fresh Prince of Bel-Air'

"She was like, 'Hey man, I'll catch you on the next movie,'" he joked.

For more from Smith, watch the clip below!