The Hills stars Heidi Montag and Spencer Pratt plan to start a family - just weeks after they married in a secret ceremony in Mexico.

The pair, who have been dating since 2006, exchanged vows while on vacation in Cabo San Lucas.

And the reality TV couple insist the next logical stage is to try for children.

Asked by website TMZ.com whether they plan on having a child, Montag says: "We are going to start it!". And Pratt adds, "(It's the) next step!"

Pratt also revealed he was surprised at the sudden wedding, which will feature in later episodes of the MTV show.

He says, "I have been trying to marry Heidi for two and a half years now. It came out of nowhere. I was like, 'This was my shot'. "

And Montag recalls the wedding day, adding, "Actually, I really started crying. My eyes just started tearing up. When you hear the love of your life just saying the most amazing, sweet things from his heart, I couldn't help it. It was the best moment in my life."