Sonogram shows baby giving thumbs up in the womb

This baby isn't even out of the womb yet, but it already is living a cool lifestyle.

A sonogram posted to Reddit by soon-to-be father Brandon Hopkins shows his baby giving a clear thumbs up.

The parents say they're expecting twins in January.

"I thought it was really cool," Hopkins told ABC News of the perfectly timed shot.

Fans of the photo on social media have nicknamed the laid-back baby "Fonzie Fetus" after the "Happy Days" character who always flashed a thumbs up.