Before dating Miro, Efron was linked to Lily Collins and Vanessa Hudgens, whom he dated for four years during the pair's Disney days.
While Efron may be looking to settle down, don't think the way to his heart is through Instagram -- it's actually through his brother, Dylan.
Alexandra wore a black and white chiffon and lace dress which was sheer at the hem and across her mid-section.
In fact, the show first kicked off all the way back in 2003 and became a favorite after-school activity for older kids day after day.Zac the commented on the snap saying: 'Heck yeah - I'm officially excited for the MTV Awards. 'Zac and Alex even wore complimentary outfits to the awards with Zac rocking an all-white ensemble.The Neighbors star wore a casual look of white jeans, a T-shirt and denim jacket.She captioned the snap of the 29-year-old and herself: '@mtv movie and tv awards backstage shenanigans with @zacefron #Summerand Brody #Baywatch.'The duo - who play love interests Summer and Brody in their upcoming film - also posed for the official photographer arm-in-arm.Walking out on stage together to present Best Actor In A Show, the pair's chemistry was certainly very apparent.