Kristen Bell in ‘Veronica Mars’
Kristen Bell is another actress who doesn’t really seem to age, but at 24 in 2004 she was definitely too old to play teen detective Veronica Mars, and one of the oldest actors of the series’s high school cast. The show wisely made up for some of the age disparity by having Veronica move on to college in Season 3, and advancing the plot nine years for its 2013 crowd-funded movie revival.