EXCLUSIVE: Ashley Greene Is Proud of Kristen Stewart for Coming Out: 'She Seems Much Happier'

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Ashley Greene still has plenty of love for her Twilight co-stars.

The 30-year-old actress sat down with ET's Katie Krause on Monday to talk about the last season of her show, Rogue, when she also opened up about her Twilight co-star, Kristen Stewart. Stewart has been notably more open about her personal life since starring in the popular vampire franchise, declaring that she was "so gay" during her Saturday Night Live monologue last month.

"I'm definitely proud o​f​ her," Greene tells ET. "I think I read somewhere her saying that now that she's being open and honest and kind of true to herself, that she's much happier and she feels much more comfortable."

WATCH: Ashley Greene Shows Off New Engagement Ring: 'It's the Most Beautiful Thing I've Ever Seen'

"I feel like I hear a lot of stories when people are dealing with coming out in that way that it's -- I mean, it's something that haunts them for a while, and it's a scary thing, and it's unexpected," she adds. "I think it was really brave of her, and I feel like she seems just much happier."

Greene, who says she's closest to her Twilight co-stars Kellan Lutz and Robert Pattinson, also loves Stewart's fierce new shaved, bleach-blond 'do.

"There​'​s certain people who can pull off stuff like that, and she looks gorgeous," she gushes.

Of course, the actress is celebrating some good news of her own -- she got engaged to boyfriend Paul Khoury in December. Greene says the two aren't planning to get married until 2018 at the earliest.

"I also had this really weird rule where I'm like, you can't propose to me unless we've been together for two years," Greene shares, revealing that she's the one who pursued Khoury after they had been good friends for five years. "Pretty early on, we realized we wanted to be together, but we knew we didn't want to rush things and kind of enjoy. We were really big on enjoying our relationship, and then living together, and then we were gonna enjoy our engagement. Like, we're not planning to get married anytime soon... it's an exciting time and I don't know why you'd want to rush over that?"

Though she does have an idea about what kind of ceremony she wants. The couple has disussed holding it in New Zealand, which is where they got engaged.

"I think we want to have a really intimate wedding, and then kind of throw a big party after," she muses. "We want it to be outside -- we want it to be surrounded by a lot of nature. He's a really big nature buff."

"And then other than that just, like, no drama -- no drama whatsoever," she stresses. "I think I'm going to be very hands-on with planning it, but I definitely think I'll work with someone especially on the day, because we don't want to have to worry about anything. I'll hand over the reigns and let someone do that specific part of it, so I can just kind of enjoy that moment."

WATCH: Ashley Greene Engaged to Paul Khoury -- See the 'Magical' Proposal!

As for what's next for Greene career-wise, the beautiful brunette says she would love to get more action roles -- specifically of the superhero variety. Greene says she's been close to landing roles for Marvel television shows twice, including Agents of Shield, though it didn't pan out in the end.

"Hopefully that means there's something about me they do like, and they haven't found the right project yet," she says.

"I've worked for a while to be taken seriously as a badass, and to look like I know my way around a gun and a knife and a hand combat scene, so now that I've kind of dipped my toe in that water, I think it'll be really fun to perhaps continue on something on that," she adds about pursuing action roles. "Like, if Marvel wants to call me ... "

's fourth season premieres on Wednesday at 9 p.m. ET/PT on Audience Network. Watch a trailer for the final season below: