Designer Nate Berkus says he knew on their first date that he would someday marry The Rachel Zoe Project alum Jeremiah Brent.

According to Us Weekly, the couple has been dating 8 ½ months and Berkus popped the question during a recent trip to Peru as part of a shopping trip with home furnishings and décor retailer One Kings Lane.

Berkus asked the question atop the 15th-century Inca site Machu Picchu.

“I've known since our first date that Jeremiah was who I wanted to spend the rest of my life with,” Berkus told PEOPLE.

“As we've shared the news of our engagement and been met with so much excitement and support we're both reminded of how important it is that every person have the legal right to marry the one they love,” he added.

The 41-year-old Berkus, who became the first openly gay man to host a nationally syndicated show with the premiere of The Nate Berkus Show, has a new line of home products being sold exclusively at Target and a new book, The Things That Matter.

(Related: Nate Berkus: It's taken me my entire adult life to stop hiding that I'm gay.)