Jessica Biel opted for a tuxedo-like ensemble at the "Runner Runner" premiere in Las Vegas, Nevada, on Wednesday. The actress accompanied her husband Justin Timberlake, who copied his wife's monochromatic style.

The couple is coming up on their one-year wedding anniversary. They tied the knot at the Borgo Egnazia resort in Fasano, Italy, on Oct. 19, 2012.

In "Runner Runner," Timberlake plays a poor college student whose foray into gambling to pay his debts leads him to Costa Rica where he hooks up with a sly offshore entrepreneur. It opens in theaters Oct. 4. Ben Affleck also stars.

Biel stars in the upcoming film "Nailed" about a small town waitress who gets a nail accidentally lodged in her head, which results in unpredictable behavior.

Check out more photos from the premiere...