A new "Machete Kills" 2013 trailer has gone viral. But before fans could go crazy over the new clip, Alexa Vega wore a cleavage-hugging dress to the movie's press conference in Beverly Hills that left people stunned.

According to JustJared, the blonde screen star, 25, wore a figure-flattering greyish dress at the Four Seasons Hotel on Sunday.

[For Vega's photos, click HERE.]

Joining the beautiful actress were her co-stars, Danny Trejo and Marko Zaroro, with the film's director, Robert Rodriguez. The film also features Lady Gaga, Amber Heard, Vanessa Hudgens, Sofia Vergara and more.

Though there's a lot of women in the film, Vega outshined her female co-stars at the press conference. Her Lorena Sabru dress with Alexandre
Birman shoes were very sexy.

But besides her trendy fashion looks and new movie, Vega has another reason to smile.

The actress announced her engagement to "Big Time Rush" singer, Carlos Pena Jr. on social media mid-September. The starlet's rep confirmed the big nupital news to JustJared after Vega posted a revealing message.

"Hello fiance," the starlet wrote on her Instagram account with a picture of Pena Jr.

According to US Weekly, Vega and Pena Jr. began dating late last year. The "Spy Kids" actress filed for divorce from film producer Sean Covel, 37, in July 2012 after two years of marriage.

Think Vega is on top of the world right now with a new movie and fiance? Check out the latest "Machete Kills" trailer and tell us your thoughts in the comments section below!