1. Brad Garrett is 6'8".
Robyn Beck / AFP / Getty Images
I thought he was, like, 6'5" max.
2. Tyler Perry is 6'5".
David Livingston / Getty Images
Did not know this.
3. Armie Hammer is 6'5".
Noam Galai / Getty Images
TBH, I thought he was, like...6'2".
4. Sigourney Weaver is 6'.
David Livingston / Getty Images
Taller than I thought.
5. Joel McHale is 6'4".
Matt Winkelmeyer / Getty Images
That's tall for him for some reason.
6. Josh Duhamel is 6'4".
Frazer Harrison / Getty Images
Thought he was a regular ol' 6'1" dude.
7. Aisha Tyler is 6'.
John Sciulli / Getty Images
In my head she's, like, 5'8".
8. John Mayer is 6'3".
Alberto E. Rodriguez / Getty Images
Thought 6' at the most.
9. Nicholas Braun is 6'7".
Alberto E. Rodriguez / Getty Images
That's, like, very tall.
10. Alfred Enoch is 6'4".
Leon Bennett
Higher to the sky than I thought!
11. Zachary Levi is 6'4".
Matt Winkelmeyer / Getty Images
Would have guessed 6'2".
12. Rory McCann is 6'6".
Angela Weiss / AFP / Getty Images
I knew he was tall, but not THAT tall.
13. John Corbett is 6'5".
Pascal Le Segretain / Getty Images
I just thought he looked tall 'cause he was standing next to Sarah Jessica Parker all the time, not 'cause he's legit extremely tall.
14. Uma Thurman is 5'11".
Christopher Jue / Getty Images
Def thought a couple inches shorter.
15. John Cleese is 6'5".
Joshua Sammer / Getty Images
More than a foot taller than I am!
16. Elizabeth Debicki is 6'3".
Vittorio Zunino Celotto / Getty Images
She is equal to Gwendoline Christie in height.
17. Allison Janney is 6'.
Valerie Macon / AFP / Getty Images
MOM!
18. Karen Gillan is 5'11".
Jean Baptiste Lacroix / Getty Images
Legit thought, like, 5'6" or something; what do I know?
19. JoJo Siwa is 5'9".
Amy Sussman / Getty Images
Yup.