Bruce William Boxleitner (born May 12, 1950) is an American actor and science fiction and suspense writer. He is known for his leading roles in the television series How the West Was Won, Bring 'Em Back Alive, Scarecrow and Mrs. King (with Kate Jackson) and Babylon 5 (as John Sheridan from 1994 to 1998). He is also known for his dual role as the characters Alan Bradley and Tron in the 1982 Walt Disney Pictures film Tron, a role which he reprised in the 2003 video game Tron 2.0, the 2006 Square-Enix/Disney crossover game Kingdom Hearts II, the 2010 film sequel Tron: Legacy and the animated series Tron: Uprising.

He played Senator Wyndom Brody in the revival series episode "Decompression".

He was married to Melissa Gilbert, who played Teresa Janovitch in "Relativity Theory", from 1995 to 2011.