In First Daughter, Samantha McKenzie develops a relationship with a character played by an actor known for what role in "Buffy the Vampire Slayer"?
First Daughter (2004 film):  It stars Katie Holmes as Samantha MacKenzie, daughter of the President of the United States, who enrolls at a college and develops a relationship with another student at the college played by Marc Blucas. Marc Blucas: Marcus Paul "Marc" Blucas (born January 11, 1972) is an American actor, known for playing Riley Finn in "Buffy the Vampire Slayer", Matthew Donnelly in "Necessary Roughness" and recently, abolitionist John Hawkes in "Underground".
Riley Finn