Mather Zickel is an American actor best known for his role as Kieran in the 2008 romantic drama film Rachel Getting Married and for his starring role as Will Keen in the television sitcom Man Up!, in 2011.
Zickel has appeared in a wide variety of film and television roles, including as Kieran in Rachel Getting Married and as District Attorney Mike Powers in Reno 911! on Comedy Central. He also appears in the Adult Swim series Delocated.
A New York native, Zickel's first major role was his portrayal of Bill Murray in the ABC telefilm, Gilda Radner: It's Always Something.
Zickel studied acting at NYU's Tisch School of the Arts and The Shakespeare Lab at the Public Theatre. He spent 15 years performing in various New York experimental venues, working with some of America's most creative young playwrights such as Sarah Ruhl, Gina Gionfriddo and Adam Bock.
On stage he appeared as Carter in Extraordinary Chambers at the Geffen Playhouse in Los Angeles.