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Jennifer Aniston, Justin Theroux

Raymond Hall/GC Images

How is it possible that Jennifer Aniston and Justin Theroux can always make dressing casual look so stylish?

The married couple went out to dinner at The Smile in NYC Thursday night, where they looked relaxed and happy fresh off the heels of their trip to the Bahamas. A source tells E! News it was just the two of them at dinner. "They were in a good mood," the source says. "It was a nice date night."

The Leftovers star looked trendy in black jeans and a dark gray denim button down, while the Friends alum kept it casual in all-black ensemble with matching sandals and glasses. She carried a blue jean jacket with her, presumably in case it got a little chilly.

As they made their way out of the famous eatery, Jen and Justin held hands and smiled. Earlier this week the duo was spotted at Mercer Kitchen in New York City, where they enjoyed lunch together. Jen, who tied the knot with Justin a little more than a year ago, gushed to Harper's Bazaar in its March 2016 issue about saying "I Do."

"Married life is so normal and fun and not much different," Aniston told Harper's Bazaar magazine. "We felt married for so long."

She continued, "I'm lucky because Justin is the funniest person I've met, and we make each other laugh. Laughter is one of the great keys to staying youthful."

Jen always has cited happiness and laughter as her key to maintaining her youthful glow, but she also has some other secrets to keeping her taut appearance. "I'll go do a workout of some sort. I have a trainer, a wonderful woman who I do this spin-yoga class [with]. We spin for half an hour, and then do yoga for 40 minutes. That's pretty intense," she revealed to Well + Good.

"Then I go to a gym, where I do strength training or just my own thing on the treadmill, the bike, or the elliptical, just to change things up. Keeping your body confused is always the key for me."