Comedic father-and-son duo, Ben and Jerry Stiller have appeared together in "The Heartbreak Kid," "Zoolander," "Heavyweights," and "Hot Pursuit."
Three generations of the Douglas clan—Kirk, Michael and Cameron—starred together in "It Runs in the Family."
Scott Eastwood had small cameos in Clint Eastwood's films "Gran Torino," "Invictus," and "Trouble With the Curve."
Brendan Gleeson and son Domhnall both starred in the "Harry Potter" series. Brendan played "Alastair Mad-Eye Moody" while his son played Ron's cool older brother Bill Weasley.
Josh Brolin makes a cameo with father James in "My Brother's War." The duo first starred together in TNT TV movie "Finish Line" in 1989.
James and Scott Caan played father and son in "Mercy" about about a young novelist trying to find love with reformed bad boy, Johnny Ryan (Scott).
Charlie and Martin Sheen both starred in "Cadence"and "Wall Street."
*Emilio Estevez (Sheen's other son) originally appeared as an extra in "Apocalypse Now"; however, the scene was later removed from the final cut.