Possible Clues:

• A beam or a flatfish
• Pancake-like fish
• 2004 film biography
• Part in the shining?
• Glimmer of hope
• A beam of light or a flat fish
• 2004 biopic that was a Best Picture nominee
• Walston of ''My Favorite Martian''
• Kroc of McDonald's
• Quite a light sort of fish