She has caused a stir with rumours she is dating her former co-star Zac Efron. And Alexandra Daddario, 32, put on an appropriately attention-grabbing display when she headed to the world premiere of Rampage, in Los Angeles on Wednesday.

The Percy Jackson film series star displayed her eye-popping cleavage in the plunging neckline of her stunning Bardot ball gown. 

Cinched at the waistline, the impressive skirt of the gown billowed out to accentuate the New York born beauty's hourglass shape.

The True Detective star showed off her quirky sense of style as she accessorised her shimmering patterned dress with a heptagon-shaped clutch bag.

Alexandra wore deftly touches of make-up to draw attention to her beautiful features and she styled her brunette tresses in a poker straight fashion.

The actress rubbed shoulders with the great and the good of the showbiz world at the star-studded premiere including her Baywatch co-star Dwayne Johnson.

Rampage tells the story of primatologist Davis Okoye (Dwayne or 'The Rock') who shares a deep connection with the intelligent gorilla George.

The once gentle creature begins to cause chaos in North America after a genetic experiment goes wrong and Davis takes it upon himself to save the monkey he loves.

Alexandra recently has grabbed the attention of headlines because of her rumoured romance with hunky Zac Efron.  The movie stars first got tongues wagging when they starred in the Baywatch reboot together last year.

Alexandra put the rumours to bed about a blossoming romance when she insisted the pair were just 'good friends'.

But it seems Zac got fans' hopes up as he shared a heartfelt message to pay tribute to the Baywatch beauty on her birthday on Instagram in March.