The 42-year-old has regularly been upstaged in the style stakes by the Sports Illustrated model, 23, while on the promotional trail for their new film.
But the former Friends star ensured all eyes were on her by unveiling a new hairstyle last night during their latest stop in Spain.
Aniston cut her long tresses into a sleek bob ahead of various press duties in Madrid.
She showed off the new do while posing at photocall at the Villamanga Hotel in Madrid with her co-star Adam Sandler.
Later, she slipped into a little black dress before meeting up with Decker, who was wearing in a pretty floral frock, on the red carpet.
It is not the first time Jennifer has cut her hair short.
Not long after she married Brad Pitt back in 2000 she snipped her hair into a similar short style.
Jennifer recently admitted she was perplexed by all the attention her haircut received during her time on Friends.
The Rachel - named after her character in the hit sitcom - remained popular for years even though the actress only wore the layered style for the first two seasons of the show.
'How do I say this? I think it was the ugliest haircut I've ever seen,' she said in the February issue of US magazine Allure . 'What I really want to know is, how did that thing have legs?'
The cut was originally created by Aniston's long-time hairstylist Chris McMillan, who still works with her today.
'I love Chris but he's the bane of my existence because he started that damn Rachel,' she added.
Jennifer is currently on the European promotional tour for Just Go With It alongside Adam Sandler and Brooklyn Decker.
