24 Zach Galifianakis Moments That Make You Laugh Every Time

From The Hangover to Saturday Night Live to Between Two Ferns, Zach Galifianakis has brought us more than a few laugh-out-loud moments over the past few years. Galifianakis turns 45 this week, so to celebrate, we're taking a look at some of the actor's most memorable one-liners, facial expressions, and hilarious dance moves. Who could forget Alan's amazing hair flip, or that time Galifianakis entered a Jennifer Aniston lookalike contest for an SNL skit? Behold, 24 Zach Galifianakis GIFs that are sure to make you crack up. Source: Warner Bros.

01
When He Isn't About to Back Down
Warner Bros.

When He Isn't About to Back Down

02
When He Brags About His Facebook Popularity
Warner Bros.

When He Brags About His Facebook Popularity

03
When He Did His Best Annie Impression
NBC

When He Did His Best Annie Impression

04
When He Dropped a Raven Reference
NBC

When He Dropped a Raven Reference

05
When He Defends His Bag Preferences
Warner Bros.

When He Defends His Bag Preferences

06
When He Got Stared Down by Obama
Funny or Die

When He Got Stared Down by Obama

08
When He Does a Little "Who Let the Dogs Out" Dance
Warner Bros.

When He Does a Little "Who Let the Dogs Out" Dance

09
When He Was an Ambidextrous Flute Player
NBC

When He Was an Ambidextrous Flute Player

10
When He Names the Famous Wolf Pack
Warner Bros.

When He Names the Famous Wolf Pack

11
When He Dances With a Dog
Warner Bros.

When He Dances With a Dog

12
When He Asks the Hard Questions
Warner Bros.

When He Asks the Hard Questions

13
When He Wore a Wig on Late Night
NBC

When He Wore a Wig on Late Night

15
When He Really, Really Teases His Hair
YouTube

When He Really, Really Teases His Hair

16
When He Attacked Justin Bieber
Funny or Die

When He Attacked Justin Bieber

17
When He Shows Off the Perfect Hair Flip
Warner Bros.

When He Shows Off the Perfect Hair Flip

18
When He Tried to Look Like Jennifer Aniston
NBC

When He Tried to Look Like Jennifer Aniston

19
When He Defends His Croc-Filled Wardrobe
Warner Bros.

When He Defends His Croc-Filled Wardrobe

20
When He Professes His Love For the Jonas Brothers
Warner Bros.

When He Professes His Love For the Jonas Brothers

22
When He Is So Proud of His Pet Purchase
Warner Bros.

When He Is So Proud of His Pet Purchase

23
When He Ponders Life's Possibilities
Warner Bros.

When He Ponders Life's Possibilities

24
When He Fought With Bradley Cooper
Funny or Die

When He Fought With Bradley Cooper