Actor Hugh Grant poses for photographers at a media launch of "The Pirates! In an Adventure with Scientists" at the Aardman studios in Bristol, western England January 22, 2012.[Photo/Agencies]

Hugh Grant is stepping away from his usual romantic fare - to walk the plank.

The British actor is starring in "The Pirates! In an Adventure with Scientists," his first animated film role. He plays a pirate captain - called Pirate Captain - on a quest to win the Pirate of the Year Award.

He joined co-star David Tennant at the premiere of the latest adventure from Aardman Animations, creators of "Wallace and Gromit," in London on Wednesday.

The "Notting Hill" actor admitted he doesn't see many similarities between himself and his pirate persona.

"I looked at it and I thought "well I'm nothing like that, this is terrible casting." So I actually had to adapt myself, and I had to do a bit of acting for once," he joked.

Pirate Captain takes his crew, voiced by such British actors as Martin Freeman, Brendan Gleeson, Russell Tovey and Ashley Jensen, from Blood Island to London, helping Tennant's scientist along the way.

On the red carpet, ex-"Dr. Who" star Tennant shared his excitement about being part of a film with such a big English cast:

"It is a bit like being called up for some sort of national service. You think 'well, I am serving my country,'" he said. "Clearly that is an exaggeration, but you do feel like in terms of the acting establishment you're being called out to bat and you don't want to mess up."

"The Pirates! In an Adventure with Scientists" opens in the U.K. on March 28 and in the U.S. on April 27 with the title "The Pirates! Band of Misfits."