Noah Cyrus
Whoa! Miley's little sister looks all grown up these days. Noah showed up to Kylie Jenner's 18th birthday with long blond hair, lots of makeup and a sexy cleavage-baring outfit.
Jared Leto
The long-haired stud is barely recognizable with green hair and no eyebrows for his role as the Joker in Suicide Squad.
Ryan Reynolds
OMG! The actor sports a fake burned face to play the Marvel anti-hero Deadpool.
Janice Dickinson
The former America's Next Top Model judge's face definitely looks different these days.
Zach Galifianakis
Upon introducing himself at the 2015 SAG Awards, fans were left stunned by the actor's skinny, close-shaven appearance. Talk about a transformation!
Renée Zellweger
After attending Elle's Women in Hollywood event, fans everywhere were talking about Zellweger's new look. She later said, "I'm glad folks think I look different! I'm living a different, happy, more fulfilling life, and I'm thrilled that perhaps it shows."
Haley Joel Osment
The Sixth Sense star has grown A LOT since his days as a child actor.
Lara Flynn Boyle
The Practice actress stepped out in L.A. in October 2013 with extremely puffy cheeks and lips.
Zach Galifianakis
The Hangover star almost looks like a different person with a trimmed beard.
Alexa Ray Joel
Billy Joel and Christie Brinkley's daughter showed off lots of cleavage and a sexy new image for a sold-out performance in New York in April 2014.
Angus T. Jones
The former Two and a Half Men actor sports shaggy hair and a bushy beard, which is a stark contrast to his younger television character.
Lil Kim
Despite denying plastic surgery rumors, the rapper's appearance seems to have changed since she broke into the music industry in 1995.
Zooey Deschanel
The New Girl star looks strikingly different without her signature bangs.
Pamela Anderson
The blond bombshell chopped off her blond locks in favor of a dramatically shorter 'do.
Tom Arnold
The True Lies actor underwent a drastic makeover after he dropped 89 pounds.
Louis C.K.
The comedian is basically indistinguishable without his facial hair.
Star Jones
The former View co-host looked like a new woman when she lost half her body weight after gastric bypass surgery.
Megan Fox
The stunning actress looks more mature since she starred in Confessions of a Teenage Drama Queen in 2004.
Mickey Rourke
The Iron Man 2 actor revealed he went under the knife to fix injuries he sustained during his boxing career.
Jordin Sparks
The singer has come a long way since the days of braces and braids.
Joan Rivers
The Fashion Police host admitted to getting a number of Botox injections, several nose jobs, an eye tuck, liposuction and a few face-lifts.