1. Dave Franco

Via giphy.com
5'7"
2. Mark Wahlberg

Via painandgain-film.de
5'8"
3. Usher

NBC / Via nbcthevoice.tumblr.com
5'7½"
4. Ed Westwick

Via teencelebgifs.tumblr.com
5'8½"
5. Robert Downey Jr.

Via merchant0fdeath.tumblr.com
5'8½"
6. Kevin Hart

MTV2 / Via angryblackman.tumblr.com
5'2"
7. Josh Hutcherson

Via lovingeverlark.tumblr.com
5'7"
8. Ed Sheeran

Via teen.com
5'8"
9. Joseph Gordon-Levitt

NBC / Via imgur.com
5'9¼"
10. James McAvoy

Via whatgifsisee.tumblr.com
5'7"
11. Niall Horan, Zayn Malik and Louis Tomlinson (or 3/5 of One Direction)

Via otfivedirection.tumblr.com
5'7½", 5'9" and 5'9" respectively
12. Aziz Ansari

NBC / Via giphy.com
5'6"
13. Daniel Radcliffe

Via mooaargifs.tumblr.com
5'5"
14. Bruno Mars

Via giphy.com
5'5"
15. Ian Somerhalder

Via ianjosephsomerhalder.tumblr.com
5'9¼"
16. Tom Felton

Via shefadestoblack.tumblr.com
5'9"
17. Emile Hirsch

Via dear-indies.tumblr.com
5'7"
18. Zac Efron

Via socialitelife.com
5'8"
Heights according to IMDb.