This year marks the 27th anniversary of National Lampoon's Christmas classic, Christmas Vacation. To celebrate, the film will return to the big screen this year at theaters around the country.

It's a favorite holiday classic around our house. We watch it every year and try to stump each other with little-known-facts and trivia about the movie. Here are a few new things I learned this year to boost my odds of winning the game this year.

• Frank Capra III was assistant director on Christmas Vacation. Capra was named for his grandfather, who directed It's a Wonderful Life in 1946 - one of the most popular Christmas movies ever made.
• Christmas Vacation was the last film Mae Questel made, who started her film career in 1930 as the voice of Betty Boop. She passed away at the age of 89 in January of 1998.
• Only two Christmas movies were released for the '89 season: Christmas Vacation and Prancer. 13-year-old Johnny Galecki of The Big Bang Theory was in both of them. 
• Clark and Cousin Eddie drink their egg nog out of Wally World mugs, the theme park the Griswold family visited in National Lampoon's original Vacation.
• We never actually see the Griswolds on Christmas Day - the film ends on Christmas Eve.