Seeing actors age on the screen is a stark reminder of time's inexorable and merciless march forward.

It's been strange enough seeing once youthful celebrities, like Harrison Ford, start to sprout gray hair and take on wrinkles, but what's even more bizarre and jarring is seeing child stars suddenly morph into fully functioning adults!

I wouldn't have even recognized some of the following actors all grown up - see if you can!

Alisan Porter

Porter starred opposite James Belushi in 1991's Curly Sue; a role which she's still best known for. She's now put her acting on hold and is focusing on her music career.