Trista and Ryan Sutter of The Bachelorette are expecting their first child, the couple tell PEOPLE exclusively.
"We are so happy after two years of trying," Trista says.
Ryan, 32, a Colorado fireman, got the news from Trista, 34, a purse designer, when he flew into Denver International Airport on Dec. 18 after participating in a mountain expedition in Argentina.
"He was completely windburned and his lips were dry," Trista recalls. "We had a three-hour drive back to our home from the airport and I couldn't wait to tell him, so I pulled him aside to a quiet part of the baggage claim area and told him there."
Adds Ryan, "I am happy to be able to finally be a dad."
The couple won't know the gender of their child until the summer; Trista is currently 14 weeks along.
"I've had horrendous morning sickness," she admits, "but everyone says that is a sign of a healthy pregnancy."
The couple met while taping The Bachelorette in 2002. They married in a televised 2003 special on ABC.