She just celebrated her 30th birthday with a luxurious tropical holiday to Bali.

Fit for a princess: The silk floor-length frock featured a strapless neckline and a flowing train

And on Monday night, Anna Heinrich swapped her bikini for a stunning gown by haute couture label Armani Privé as she stepped out for the Australian Fashion Film Awards in Melbourne.

The former reality star took to Instagram to share glimpses of her look for the night, which included the $30,000 dress.

The pricey gown was also embellished by Swarovski crystals along the bust and on one shoulder.

Anna oozed elegance in the dress, with her figure pouring perfectly into the slinky garment.

The girlfriend of former Bachelor star Tim Robards kept her hair and makeup simple as to not detract from the wow factor of the dress.

With lashings of mascara, flawless foundation and a pink lip, Anna's blonde locks were styled in a relaxed up-do.

Sharing a snap after returning home from the event, the Sydney-based beauty wrote: 'Quick bathroom selfie before I hit the sack. Thanks for having me tonight.'

She later posted another photo showing the full effect of the dress while tagging a designer rentals company, who appear to have worked with event organisers to supply dresses to attendees. 

It appears Anna's man Tim stayed home for the night while the blonde beauty attended the event.  

Anna's outing comes after they both travelled to Bali last week for Anna's milestone birthday.

Taking to Instagram on Saturday, the blonde beauty uploaded a photo of herself sitting among her friends, family and boyfriend Tim, moments before blowing out her birthday candles.