In 1969, a now-iconic commercial first popped the question, “How many licks does it take to get to the Tootsie Roll center of a Tootsie Pop?” This deceptively simple line in a 30-second script managed ...

Sometimes, actors elevate stories through their own creative—and unexpected—contributions. And while going off-script can be a risky venture, it can also create iconic moments on film and TV. Here are ...