Jennifer Aniston & Justin Theroux's Wedding Planning Underway

02/27/2013 at 07:50 AM EST

She conquered the Oscars, and now Jennifer Aniston is preparing for another very big day.

The actress, 44, is in the process of planning her wedding to screenwriter-actor Justin Theroux, 41 – and she has already checked off some major tasks on her to-do list, including choosing wedding bands, setting a date and narrowing down dresses.

Just don't expect the wedding, which is likely to take place soon after Aniston wraps her current film in Connecticut on March 8, to be a lavish production.

"It will be a small affair with their closest friends," a source close to Aniston tells PEOPLE in this week's cover story.

PHOTOS: Oscar Couples Spread the Love

In the meantime, the bride-to-be is enjoying life with her future groom.

"Jen seems more confident than ever," says the source, "and they've become a great team."

For much more on Aniston and Theroux's wedding plans, their romantic Oscar night and look inside their relationship, pick up this week's issue of PEOPLE

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