The Office star exchanged vows with Kirk, who has also appeared in the hit U.S. comedy, during a private ceremony at an undisclosed location on Saturday (03Jul10), reports Usmagazine.com.
Fisher accepted Kirk's marriage proposal during a European vacation in June (09). The couple has been dating since January 2008.
This is the first marriage for Kirk. Fischer, 36, divorced her first husband, director James Gunn, in 2007.