24 pairs of celebrities you had no idea were the same age

The INSIDER Summary:

• These pairs of celebrities are the same age, though you'd never guess it.
• From actors to models, here's who looks younger (or older) than you think.

All celebrities are fabulously attractive, no matter their age — but it can be surprisingly tough to guess how old they really are. 

Case in point: Check out these 48 side-by-side snapshots of famous actors, musicians, and models. It's almost impossible to believe that each pair is the same age. 

Actors Paul Rudd and Matthew Perry are 47.

This quiz proves that it's nearly impossible to determine Paul Rudd's real age based on photos alone.

Actresses Halle Berry and Cynthia Nixon are 50.

Actors Dylan McDermott (of "American Horror Story") and Steve Carrell are 54.