In the 20th Century Fox spot for the upcoming computer-animated film, Rio, Angry Birds fans were directed to a special hidden egg on level 13-12 of the best-selling mobile phone game.
This level is part of the new Angry Birds update that hit iPhone and Android devices earlier this weekend. Fans that unlock the hidden egg will be treated to a Super Bowl-themed secret level.
The clue comes at the 26 second mark in the ad for Rio, which you can watch below.
If you want to uncover the special golden egg -- go to that level and shoot a white bird backwards and then drop an egg. This will unlock a new football-shaped golden egg in the Golden Egg menu in the game.
Complete that game level and players will have the opportunity to enter a contest to attend the Rio movie premiere.
