vanessa minnillo

After almost four years of dating, Nick Lachey and Vanessa Minnillo are engaged, their reps confirm exclusively to UsMagazine.com.

"We're excited and incredibly happy about our engagement and we look forward to a wonderful future together," the couple said in a statement.

"They're so happy, doing great. Thrilled about it," a source close to the couple also tells UsMagazine.

The couple began dating in 2006, not too long after Lachey's very public divorce from his first wife, singer Jessica Simpson. The pair broke up briefly last year but reconciled soon after.

In an interview with Parade earlier this year, Minnillo talked about what it takes to have a strong relationship in Hollywood. "You have to talk through everything. It's all about communication. We talk daily about things that upset us. It's about having a sounding board because if you hold in all your thoughts, dreams, anger and anxiety than you're only hurting yourself, " she said.

"You can't go through your day and not talk to your partner," Minnillo continued. "Ultimately, the person you're going to spend the rest of your life with is going to be your best friend, so why wouldn't they know everything about your life?"

The 'True Beauty' host also shared her thoughts on doing a reality show with her beau. "I personally have no desire. Nick has done one before and he was very successful at it and whatever he chooses to do with his future I will support him 100%.... But I personally don't want to do one."