The 44-year old movie star has always kept a svelte physique and enviable washboard stomach. Just check her out in this still from recent film, The Millers...
But since she wore that tight fitting Burberry dress (the one which was custom made but still too small...hmm...), Jen hasn't been able to get away from baby rumours.
However, Jennifer's people have insisted, once again, that there is no baby on the way after Us Weekly published their "Jen's Big Secret: Pregnant" issue.
But the Friends star has previously said in 2005 that she'd love a baby one day, "I've never in my life said I didn't want children...I do and I will."
AND the pair have claimed that, although they haven't been able to confirm a convenient date for their wedding yet, they "already feel married". Awww.
Jen may not be pregnant right now, but maybe sometime soon...
Take a look at some of Jen's best fashion moments in the gallery below...
JENNIFER ANISTON BACK TO BLACK IN ALEXANDER MCQUEEN
JENNIFER ANISTON ROCKS FLIRTY DIOR FLORALS IN LONDON
JENNIFER ANISTON GOES MAKEUP FREE IN RARE SELFIE