The former child star, who hit it big in the "Spy Kids" movies and will appear in "Machete Kills," is set to walk down the aisle for the second time -- this time with Big Time Rush star Carlos Pena, Jr.
Carlos, 24, posted a photo of his brand new fiance, 25, wearing her giant engagement ring -- which appears to have a canary yellow stone. Vega shared a new photo of Pena too, calling him her "fiance."
Vega was previously married to producer Sean Covel from 2010 to 2012. Hopefully this marriage lasts a little longer!