Ten characters who have been played at different ages by different actors in the same television episode or movie:

1. Clark Kent, Smallville (Tom Welling and Malkolm Alburquenque)
2. Buffy Summers, Buffy the Vampire Slayer (Sarah Michelle Gellar and Mimi Paley)
3. Jean Grey, X-Men: The Last Stand (Famke Janssen and Haley Ramm)
4. Ro Laren, Star Trek: The Next Generation (Michelle Forbes and Megan Parlen)
5. Delores Landingham, The West Wing (Kathryn Joosten and Kirsten Nelson)
6. Dewey Cox, Walk Hard: The Dewey Cox Story (John C. Reilly and Conner Rayburn)
7. Truman Burbank, The Truman Show (Jim Carrey and Blair Slater)
8. Shawn Spenser, Psych (James Roday and Liam James)
9. Cady Heron, Mean Girls (Lindsay Lohan and Jessie Wright)
10. Indiana Jones, Indiana Jones and the Last Crusade (Harrison Ford and River Phoenix)

Kirsten Nelson is a little bit of a binding agent here. She portrayed the young Delores Landingham in the West Wing episode "Two Cathedrals;" she also made a guest appearance in everybody's favorite episode of Buffy the Vampire Slayer, "Doublemeat Palace," and she's a regular on the USA original series Psych.