Not only did she chop off her locks and debut a dramatic new 'do, but the 44-year-old also made it big at the box office with her comedy flick We're the Millers, which debuted at No. 2 and raked in $26 million during its opening weekend.
In addition to the success of the film, Aniston got into the best shape of her life for the Rawson Marshall Thurber-directed flick, which also starred Jason Sudeikis and Emma Roberts, going on a super-strict diet and baring her bangin' bod on the big screen in nothing but a bra and underwear.
"Honestly, it was the craziest workout," she previously said of her fierce commitment to get into prime stripper shape. "My diet has always been pretty clean, but I think I was super, super-strict, especially in terms of, I'll usually cheat once or twice a week and I just kind of didn't."
So what did she do when she simply had to break free from her intense diet regime?
"When I really wanted to have a cheat day, I had to have a kale chip," she confessed.
Yeah, girl has dedication.
No surprise, Jen looked better than ever while promoting the film, sporting one of her best looks yet at the premiere in Berlin, and she even traded her signature all-black style for a radiant red Valentino dress at this year's Oscars, where she was joined by her hunky man.
As always, it's been an eventful year for our favorite Friend, but with endless baby and wedding rumors, we can't wait to see what 2014 has in store.
So with that, we say cheers to the future Mrs. Justin Theroux! Here's hoping 2014 is the year Jen and Justin finally say their I-dos.