Alan Douglas Ruck (born July 1, 1956) is an American actor. He is best known for portraying Cameron Frye in John Hughes's film Ferris Bueller's Day Off (1986), as well as television roles as Stuart Bondek on the ABC sitcom Spin City (1996–2002) and Connor Roy on the HBO series Succession (2018–2023), the latter earning him a Primetime Emmy Award nomination.

His other film credits include Bad Boys (1983), Three Fugitives (1989), Young Guns II (1990), Speed (1994), and Twister (1996).