Karlie Kloss Engaged to Joshua Kushner

After six years of dating, Joshua Kushner, 33, popped the question and Karlie, 25, said yes! On Tuesday, she posted an Instagram pic of herself kissing Joshua, saying, “I love you more than I have words to express. Josh, you're my best friend and my soulmate. I can't wait for forever together. Yes a million times over.”

Karlie has not posted a pic of her engagement ring yet, so we'll have to wait!

A source told People magazine, “He proposed a few weeks ago during a romantic weekend together in upstate New York. They're both overjoyed and happily celebrating. Their hearts are full and they're excited to build their future together.”

While they've kept their relationship off the radar over the years, Karlie expressed her love for him on Instagram last month. She wrote, “Happy Birthday to my love + my best friend in the Universe. Love you more than I can ever express.”

Karlie and Joshua — the younger brother of Jared Kushner — are currently spending time together in Europe.