We all know what DILF means. And of course, MILF. But how do we feel about starting GGILF?

Okay, that might be a bit of a stretch, but this picture of a certain great-grandpa might make you think twice.

Justin Bieber recently uploaded a photo on Instagram that features a dapper gentleman in a houndstooth jacket. The sepia-toned photo is old and faded, and the subject looks very Bieber-esque.

"My great grandpa swaggin," the "Sorry" singer wrote. Between their similar eyebrows and swooped-back hair — a 'do which appears to have been in style, even back in the day — the resemblance is pretty uncanny.