Culture July 24, 2018

Model Karlie Kloss engaged to Joshua Kushner, will be Ivanka Trump's sister-in-law

WATCH: Model Karlie Kloss and Ivanka Trump are going to be sisters-in-law

Karlie Kloss and Ivanka Trump are going to be sisters-in-law.

The model and her longtime boyfriend, Joshua Kushner, announced their engagement on Tuesday in separate social media posts.

Joshua Kushner, a real estate investor and technology entrepreneur, is also the younger brother of Jared Kushner, who serves as a senior adviser to the president and is married to his daughter, Ivanka Trump.

"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," Kloss wrote on Instagram, along with an emoji of a diamond ring.

Kusher shared a photo of Kloss on the social media platform and added the caption, "fiancé."

(MORE: Supermodel Karlie Kloss talks feminism, relationship with Joshua Kushner)

Kloss, 25, and Kushner, 33, have been dating since 2012 and for the most part, have kept their relationship private. They've also not publicly commented on Jared Kushner's involvement with the White House.

However, in 2016, a spokesman for Joshua Kushner told Esquire magazine that he is a lifelong Democrat and did not plan to vote for Donald Trump. Similarly, Kloss tweeted "#ImWithHer" on election day.

(MORE: Karlie Kloss dishes on her first day as an NYU student)

A representative for Kloss did not immediately respond to a request for comment from "Good Morning America."