Zach Galifianakis (born October 1, 1969) is an American actor and comedian, known for his surreal humor and eccentric roles.

He achieved international fame with the role of Alan Garner in *The Hangover* comedy trilogy, where he portrayed a bizarre, socially inept yet surprisingly charismatic character that became his trademark.

Following the success of *The Hangover*, he solidified his career with similar roles in comedies such as *Due Date* alongside Robert Downey Jr., and *Dinner for Schmucks*. His acting style is characterized by a comedic approach often based on the absurd, deadpan delivery, and an endearing awkwardness, frequently portraying outsiders or marginalized figures who unintentionally cause chaos. He has also demonstrated versatility in critically acclaimed productions, such as *Birdman* (2014), where he delivered a more nuanced performance while still retaining his peculiar comedic flair.