Nearly a year after tying the knot, Jessica Biel and Justin Timberlake are still totally 'N Sync'.The couple stepped out in matching outfits at the premiere of Justin's new film in Las Vegas on Wednesday. 

Jessica, who recently took on her husband's surname, mirrored her husband's smart look with a Dolce and Gabbana suit. The actress hit the red carpet in an impeccably tailored, double-breasted tuxedo with diamond encrusted buttons, and an ivory blouse.She complemented her masculine ensemble with barely-there makeup, black heels and a Mark Cross box bag, injecting a pop of colour with sapphire earrings and bright red nails.Joining Justin, 32, and Jessica, 31, on the red carpet at the Planet Hollywood Casino and Resort were his co-stars Ben Affleck and Gemma Arterton.

Justin Timberlake, Gemma Arterton and Ben Affleck 

British Bond beauty Gemma, 27, looked incredible in a floor-length green gown that complemented her hourglass figure. Father-of-three Ben, meanwhile, looked dapper in a grey suit and tie. He was in high spirits at the screening, laughing and joking with Justin as the two leading men posed for pictures.The crime thriller, which has been co-produced by Leonardo DiCaprio, follows Princeton student Richie Furst (Justin) who is left penniless after being conned out of his tuition fees by an online poker site.When he learns the site is being run from a remote island location, he goes to confront the site’s owner Ivan Block (Ben), but is lured into becoming his protégé and right-hand man. However, their relationship is shaken when an FBI agent (played by actor Anthony Mackie) tries to use Richie to bring Ivan down.

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