Brett Gelman is an American actor and comedian best known for co-starring in the Adult Swim comedy-action series Eagleheart (2011-2012) and for his starring role as Mr. K on the sitcom Go On, since 2012.
He is also known for his recurring role as Mr. Gilbert in the short-lived television comedy series The Inbetweeners, in 2012.
Gelman, an Upright Citizens Brigade regular, could be seen in The Other Guys, directed by Adam McKay. In addition, Brett has also appeared in both seasons of the HBO series Funny Or Die Presents.
Brett has also guest stared on The League, as well as Curb Your Enthusiasm and Bored to Death on HBO.