They've got a team on hand to make sure they're always looking their best - but sometimes Hollywood stars need to ditch the glam to land movie roles.

Plenty of our favourite stars - including Kaley Cuoco, Ryan Reynolds, Anne Hathaway and Jennifer Aniston - have undergone complete transformations for their pay cheque.

Some of the changes were real, others were made using clever behind-the-scenes tricks like prosthetics, but either way - the results are staggering.

To check out some of the most dramatic makeovers (or makeunders), see below:

Advertisement

Ryan Reynolds in Just Friends (2005)

Ryan Reynolds is almost unrecognizable.
Ryan Reynolds is almost unrecognizable.

Anne Hathaway in Princess Diaries (2001)

Anne Hathaway in Princess Diaries.
Anne Hathaway in Princess Diaries.

Charlize Theron in Monster (2003)

Charlize in Monster
Charlize in Monster

Jennifer Aniston in Cake (2014)

Jennifer Aniston in Cake.
Jennifer Aniston in Cake.

Javier Bardem in Skyfall (2012)

Javier looks very different.
Javier looks very different.

Jared Leto in Chapter 27 (2007)

Jared Leto has a dramatic change.
Jared Leto has a dramatic change.

Emma Thompson in Nanny McPhee (2005)

Emma Thompson played Nanny McPhee in 2005.
Emma Thompson played Nanny McPhee in 2005.

Kaley Cuoco in Burning Bodhi

Kaley looked very different.
Kaley looked very different.