Rachel McAdams spoils 'Time Traveler's Wife' plot

There's a certain amount of mystery involved with The Time Traveler's Wife ... or there was until Rachel McAdams came along.

The film's star accidentally gave away some major plot points during an interview with Jon Stewart on The Daily Show. Oops.

Stewart was joking how it must be difficult to maintain a relationship if one partner keeps traveling through time, and that's when McAdams let fly with the details.

Spoiler alert! Even if you've read the book, you may not want to watch the clip in case it diverges from the original.

Source & Video