It looks as though Jennifer Aniston dressed to impress during her trip to Bora Bora with her fiancé, Justin Theroux. The Hollywood actress allegedly got "bikini ready" by cutting back on junk food for her big romantic getaway.

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Aniston's yoga instructor Mandy Ingber dished on Tuesday about how Aniston got her body in shape just before her big trip, where she and Theroux celebrated his birthday and their second engagement anniversary.

Ingber told ABC News, "Jen's a very consistent exerciser and eater. But when she has something she needs to focus a little more on, she just tightens it up a little bit."

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She added, "She won't have the extra chips. It's kind of like just being disciplined, she's like anyone else that she goes through those times when she can lose a little but pretty much, she's always in great shape."

The couple, who have been engaged since August 2012, jet-setted to the Tahitian island for a week-long stay.

A source told People Magazine last Wednesday, "It was a romantic trip to celebrate their engagement anniversary and Justin's birthday. It's their first vacation together in Bora Bora and they were excited about the trip."

The site also says that while their wedding plans are still in the works, Aniston will be having a very busy few months ahead of her as she's scheduled to attend the Toronto Film Festival and promote her new film, Life of Crime.

Tags: Jennifer Aniston Justin Theroux