Justin Theroux Grows a Beard!

Justin Theroux in NYC on Feb 4, 2013. Jackson Lee/Splash News Online

Cold weather got to ya, Justin? Justin Theroux debuted a new look with a full beard while hurrying to a meeting in New York City on Monday, Feb. 4. 

The Wanderlust actor, who got engaged to Jennifer Aniston back in August, looked dapper in a snug navy jacket, warm scarf, and his signature jeans and combat boots. He topped off his look with a pair of Hollywood-ready aviator shades.

Just last month, Aniston, 43, reminisced about their holiday getaway to Cabo San Lucas, Mexico, with pal Jimmy Kimmel on his show. Kimmel, his fiancee Molly McNearney, John Krasinski and wife Emily Blunt also joined in on the warm-weather vacation.

"All of you boys were secure enough in your masculinity to join the women on spa day,” Aniston joked with Kimmel. "So the girls had massages, whilst the men were having manicures and pedicures."

Theroux and Aniston were snapped enjoying each other's company during their vacation, and eyewitnesses tell Us Weekly that the pair looked very much in love.

"Every day they followed the same routine, with a workout in the morning with Pilates and yoga, followed by tanning time all afternoon," a source told Us. "All Jennifer wanted was to work out, tan, have margaritas and be with her man."

After dating for 18 months, Theroux, 41, proposed to Aniston during a fancy dinner at Greenwich Village eatery Blue Hill on his birthday, Aug. 10.

"Justin Theroux had an amazing birthday Friday, receiving an extraordinary gift when his girlfriend, Jennifer Aniston, accepted his proposal of marriage," his rep shared in a statement at the time.

For access to all our exclusive celebrity videos and interviews – Subscribe on YouTube!