ET's Katie Krause caught up with Austin at the MTV Music Video Awards on Sunday, when he dished about how he and Vanessa have been able to keep their relationship so strong. The two have been dating since 2011.
"I think you just have to -- it’s important to put that other person first," the 24-year-old former Carrie Diaries star shared. "If you're constantly looking for ways that you can make them happy, and they're constantly looking for ways that they can make you happy, then you kind of lift each other up as much as possible and you can’t go wrong."
Recently, 26-year-old Vanessa even dedicated her award for Breakthrough Performer at the 2015 Industry Dance Awards in Los Angeles to Austin's late mother, Lori, who died of cancer last year. Vanessa also revealed that her own father, Greg, is currently battling stage four cancer.
"This award, it means a lot to me but I dedicate it to my boyfriend's mom, Lori, my dad, and to all the families out there who are struggling with this [cancer], because it really takes a strong person and a strong family to be able to help those out who are going through this," Vanessa said during her emotional acceptance speech.
But aside from supporting one another through the tough times, we're sure Vanessa is proud of Austin's new role in MTV's new series, The Shannara Chronicles. The intense sci-fi series is set to debut in January 2016.
"I'm the last in this bloodline called the Shannara bloodline, and so it's a family name, but I’ve never felt like a hero or anything like that, and I’m getting called on this quest to save the world," Austin told ET about the plot of his latest project. "I’m supposedly the last in this ancestry."
Watch the video below to see Vanessa's heartbreaking dedication to Austin's late mother earlier this month.