Can you believe that Harry Styles is turning 26 years old on Saturday, February 1?! It seriously feels like just yesterday that the singer was 16 years old and auditioning for The X Factor — it’s crazy how fast time flies, isn’t it?

Fans have seen the One Direction member transform himself from a young child star to a mature adult, and he’s definitely accomplished a lot over the years. Besides releasing five studio albums, embarking on numerous world tours, breaking tons of records and winning so many awards with the group, he also dropped two solo LPs and starred in the movie Dunkirk!

Yeah, fans have truly had the pleasure of watching him grow up right in front of their eyes, and boy, has he changed a lot since he was first propelled into the spotlight back in 2010. In honor of his birthday, J-14 decided it’s time to take a walk down memory lane and look back at his epic transformation, so we went ahead and rounded up some throwback pictures of him from back in the day. Fans are seriously not going to believe how different he looked!

Scroll through our gallery to see 20 old photos of Harry, and prepare to be shook over his major glo’ up!

Love J-14? Be sure to subscribe to our YouTube channel for fun, exclusive videos with your favorite stars.