Robin William's last role is as extraordinary as his real-life. The late acting legend is the voice of Dennis, a talking dog, in Terry Jones' Absolutely Anything.

The comedy film stars Simon Pegg in the lead role as Dennis' owner, a teacher who is given unlimited powers by aliens and uses them only for personal gain (hence the talking dog). This, however, backfires for Pegg.

The trailer for Absolutely Anything, which was released today, shows Dennis nag for biscuits and root for his horrified master while he's on a date with his dream girl. These brief moments are endearing, doubly so because this will be the last of William's expected posthumous releases.

In an interview with Deadline, Jones explained how he got Williams on board: “I came to LA to receive an award. Robin Williams was sitting in the front row and I asked him, would you play Dennis the Dog? I’d met him before a couple of times at Terry Gilliam’s dinners. I sent him the script and he said, ‘Let’s get this baby made!’”

Jones wrote the script for Absolutely Anything around 20 years ago, but postponed production “because Bruce Almighty came out”, he added.

Interestingly, Jones who is best known for Monty Python, cast the other surviving members of the comedy group in the role of the aliens, which marked the first time in 18 years that they got together in a film.

In an interview with Empire magazine, Jones explained why he thinks Dennis the Dog will prove a big hit with moviegoers.

“I think he’s going to steal the show,” he said. “We’ve got a real dog, Mojo, who is very obedient, and a wonderful dog, a mongrel, but CGI work will be done. Simon Pegg is a big dog fan, and him and Mojo get on very well. Before Douglas Adams died, he looked over the script and he said that Dennis the Dog’s scenes were the funniest scenes.”

The film will be released in UK cinemas on August 14.