Hamish Linklater is an American actor and playwright. He is known for playing Matthew Kimble in The New Adventures of Old Christine, Andrew Keanelly in The Crazy Ones, and Clark Debussy in Legion. He is the son of dramatic vocal trainer Kristin Linklater. In 2021, he starred as Father Paul in the horror miniseries Midnight Mass, for which he received high critical acclaim.

The New Adventures of Old Christine is an American sitcom starring Julia Louis-Dreyfus as Christine Campbell, a divorced mother doing her best to keep pace with those around her. Clark Gregg co-starred as her ex-husband Richard, with whom Christine maintains a close relationship despite their divorce, as well as Hamish Linklater as her brother Matthew and Wanda Sykes as her best friend, Barb. It ran on CBS from March 13, 2006 to May 12, 2010.