The two enjoyed some retail therapy at a home décor and clothing store with a few bags in tow.
Aniston rocked her usual California cool style with a pair of neutral wedges, boyfriend jeans and a casual tank top. Meanwhile, Theroux looked dapper as can be in a fitted T-shirt and a pair of worn-in jeans.
It appears that the engaged duo is putting the finishing touches on their mansion in Bel-Air, Calif. They've been remodeling the massive digs now for months and have just moved in as of May.
The over 8,000-square-foot home underwent major renovations under Aniston and Theroux's close watch.
They made extensive updates throughout the home to suit their every want and need and even added over 4,000 additional square feet.
Among some major updating throughout the manse, they added a new deck with a trellis and expanded upon the master suite.
Theroux arrived in New Orleans a few days early to spend time with the groom and other guys friends, while Aniston stayed in Los Angeles to set up shop at home.
Theroux was in the wedding party and, per an eyewitness, was busy pulling usher duty, which at one point included attending to two dogs that also played a role in the Bell-Campbell nuptials.
Theroux and Aniston did not, however, stick around for Sunday brunch, our source telling us that they instead flew back to L.A. at around noon.
And it looks like the couple's own wedding may still be on the back burner, for now.
In April, Aniston told E! News that she still didn't have a wedding dress picked out and that all the planning that needs to go into the upcoming nuptials "might make me crazy."