Showing off her equestrian abilities, Jennifer Garner saddled up on the set of "Arthur" in Long Island, New York on Friday (July 23).

Clad in a white wedding dress, the former "Alias" actress grabbed the reins as co-star Russell Brand proceeded to make numerous priceless faces during the course of their trot.

While Russell has been busily working on the film with the likes of Helen Mirren, Miss Garner is just now getting started with her portion of the Jason Winer directed comedy.

As for the plotline, a synopsis via IMDB tells that "Arthur" is about "a drunken playboy standing to lose a wealthy inheritance when he falls for a woman whom his family doesn't like."