Nikki Reed & Ian Somerhalder Get Married ... That Was Fast!

4/27/2015 6:09 AM PDT

Nikki Reed's marital status has gone from married to divorced to married again in the blink of an eye ... after getting hitched this weekend to "Vampire Diaries" star Ian Somerhalder.

Reed and Somerhalder exchanged vows Sunday in Malibu, where guests included "Glee" star Lea Michele and her boyfriend Matthew Paetz.

Reed split from "American Idol" star Paul McDonald in March 2014 and began dating Somerhalder in July. They even did a short engagement ... she got the ring in January, now they're hitched in April.

Somerhalder famously dated co-star Nina Dobrev for a few years, but this is his first marriage.