Pack your bags for a Las Vegas family vacation with the Griswolds—and don’t forget these 15 little-known facts!

1.Vegas Vacation is the fourth movie in the Griswold’s series of vacations, but it isn’t technically the last.

A made-for-TV sequel to Christmas Vacation, titled National Lampoon’s Christmas Vacation 2: Cousin Eddie’s Island Adventure, was made in 2003 and features the character Audrey Griswold.

2. Vegas Vacation is the first Vacation movie not written by John Hughes.

It’s also the first in the series to lose the “National Lampoon’s” moniker.

3. This film marks the fourth time that the Griswold kids, Audrey and Rusty, were recast.

In the four movies, Rusty and Audrey have been played by Anthony Michael Hall and Dana Barron; Jason Lively and Dana Hill; Johnny Galecki and Juliette Lewis; and Ethan Embry and Marisol Nichols. Barron reprised her role as Audrey in National Lampoon’s Christmas Vacation 2: Cousin Eddie’s Island Adventure.

4. Comedy legend Sid Caesar makes his last on-screen appearance in a theatrically released film in Vegas Vacation.

He plays Mr. Ellis, the character at the Keno game at the end of the movie.

5. 1992 Playboy Playmate of the Year Corinna Harney is one of the women Clark hits on at the blackjack table.

Vegas Vacation was her first theatrically released film appearance.

6. Vegas Vacation is the first Vacation movie to be rated PG.

The rest of the movies in the series are either rated R or PG-13.

7. Vegas Vacation is the lowest grossing movie in the Vacation franchise.

It had a theatrical gross of $36,400,360. Christmas Vacation is the highest grossing installment with $71,319,526.

8. Jilly from Philly is played by the film’s producer, Jerry Weintraub.

9. Weintraub’s connections helped him shoot in one Vegas’s swankiest hotels.

The production was granted access to the Mirage Hotel and Casino in Las Vegas because Weintraub was close friends with Steve Wynn, the billionaire who owned the Mirage at the time.

10. Fans of classic Nickelodeon might recognize the fake I.D. salesman and Frank Sinatra impersonator.

He’s played by Toby Huss, aka Artie the Strongest Man in the World from The Adventures of Pete & Pete.

11. Wayne Newton’s house in the movie is actually Wayne Newton’s house in real life.

Called “Casa de Shenandoah,” the property went up for auction in 2013 for $70 million.

12. The cast boasts more than one Saturday Night Live alum.

The reception desk employee at the Mirage is played by Julia Sweeney, who appeared on Saturday Night Live from 1990-1994. Chevy Chase famously appeared in the original SNLcast from 1975-1976.

13. This is the third Vacation movie to incorporate Lindsay Buckingham’s song “Holiday Road.”

It was left out of Christmas Vacation.

14. Clark plays a number of fake games with Uncle Eddie at the rundown casino.

Pick a Number Between 1-10; Coin Toss; War; Rock, Paper, Scissors; and Guess Which Hand were all made up. Only a version of War is played in actual casinos.

15. The sign at the end of the movie says Chicago is 1,880 miles from Las Vegas.

In fact, Chicago is only a little over 1,700 miles from Las Vegas.