LATEST: THE OFFICE star Ricky Gervais is the latest actor to join the cast of Ben Stiller's new comedy.

Gervais, who met Stiller when the American appeared in the comedian's British TV show EXTRAS, only decided to accept the role in NIGHT AT THE MUSEUM as a favour to the STARSKY AND HUTCH star, saying, "I owe him one."

The 44-year-old added, "It's a cameo written for me, and all my scenes are with Ben."

The film, which also stars veterans Dick Van Dyke and Mickey Rooney, sees Gervais playing the uptight owner of New York City's famous Museum Of Natural History, where dinosaurs are brought to life.