The final trailer to "Night at the Museum 3: Secret of the Tomb" has been revealed a month before it is unveiled in cinemas.

The movie has become one of the most anticipated films of the holiday season as it stars the late Robin Williams. The movie represents the actor's last big screen role and will feature him in the role of Teddy Roosevelt, which he created in the original 2006 film.

The recent trailer shows that things aren't all good in the world of supernatural museum exhibits: The magical tablet that animates him and buddies like Cowboy Owen Wilson and Roman Soldier Steve Coogan is running out of magic and will prohibit them from coming back to life.

As a result, security guard Larry Daley (Ben Stiller) has to round up the whole gang and fly to a Natural History Museum in London. The new trailer revealed new characters such as the iconic hero Lancelot and a cave man played by Stiller.

It also features a number of CGI effects, including a skeleton dinosaur.

The "Night at the Museum" franchise began in 2006. The first feature opened during the holiday season and became one of the biggest surprises of the year. The movie opened to a solid $30 million, but went on to gross $250 million. It also held on to the No. 1 spot for three consecutive weekends.

As a result, three years later Fox attempted to change the strategy and released "Night at the Museum: Battle of the Smithsonian" in the summer during Memorial Day weekend. The result was very disappointing. The movie opened to $54 million and ended up making $177 million.

The latest installment has a lot of attention because of Williams' untimely death, and many pundits are estimating that the sequel will only make $120 million. The reason for the low expectations is also due to how bad sequels did this past summer and the fact that it took five years between movies. "How to Train Your Dragon 2" suffered loses because of the time gap, even though reviews were phenomenal. Additionally, the winter season seems extremely crowded with more anticipated films.

"Night at the Museum: Secret of the Tomb" was one of four completed films that Williams left in the vault after his death in August. The others include "Merry Friggin' Christmas," a comedy out on VOD this week, and "Boulevard," a dramedy co-starring Bob Odenkirk and Kathy Baker that premiered at the Tribeca Film Festival. He also has "The Angriest Man in Brooklyn," a comedy co-starring Mila Kunis that was quietly released this summer.

"Night at the Museum: Secrets of the Tomb" is slated to open on Dec. 19 and also stars Ben Kingsley, Rami Malek, Ricky Gervais, Mickey Rooney, Rebel Wilson and Dan Stevens. The movie was directed by Shawn Levy, who helmed the first two installments and was produced by Chris Columbus and Levy. Guillermo Navarro served as the cinematographer, and Alan Silvestri composed the musical score.

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