Jennifer Aniston is busy planning a wedding to fiancé Justin Theroux, but she's still got to pay the bills.

The 43-year-old actress is back on set this week shooting scenes for her new film "We're The Millers," which also stars Jason Sudeikis and Emma Roberts.

Aniston sported thick-rimmed black spectacles and a dark cardigan as she worked on the set in Domingo Pueblo, New Mexico, on Monday.

CLICK HERE to check out photos of Jennifer Aniston and Jason Sudeikis working on the set of "We're The Millers."

The film was first shooting in North Carolina, and the set there was the first place Aniston was spotted after Theroux popped the question. At the time, she played coy with photographers and hid her engagement ring to prevent the world from seeing the stone, reportedly an eight-carat emerald-cut diamond.

Aniston and Theroux haven't officially announced any plans for their upcoming nuptials, but Aniston is already busy preparing herself for the big day, according to reports.

She recently dropped approximately $2,000 on a customized skin rejuvenation treatment at the Beverly Hills skin care center Mila Moursi. The facial treatment, which is allegedly a favorite among Hollywood's biggest stars, lasts an hour and a half.

"Our leading ladies like to get the treatment," a source said. "Jen's been a regular at Mila Moursi since August, when she got engaged."

"Our exclusive method has been proven to minimize the aging process, nourish and rejuvenate devitalized or sun-damaged skin, help lift and contour the face. Regular treatments reduce the appearance of fine lines and wrinkles, and help maintain a firm, glowing skin," the website description says.

Friends of Aniston's have also reported that the actress is ready to get pregnant any day now, even if that means sporting a baby bump during her wedding ceremony.

"It's no secret she wanted a baby yesterday, so they're not wasting any time," the source said. "She's not in denial; she knows it may be difficult."

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Jennifer Aniston, Jennifer aniston engaged, Justin Theroux