The couple are expecting their first child in 2012 and Chantelle - who struggled with fertility issues - has revealed she cannot wait to become a mother.
Asked what her New Year's resolution is, Chantelle said: "To be brilliant parents!"
Alex added: "We're gonna be the best. I really can't wait to be a daddy."
The couple are busily preparing for the tot's arrival with Chantelle revealing she can't wait to find out the sex so she knows what baby clothes to buy.
She said: "I can't wait to buy more baby clothes! I want to know the sex of the baby so I can plan the wardrobe!"
Alex and Chantelle have had a rollercoaster year between getting engaged and finding out they are to become parents and they said 2011 has been full of highlights.
In a joint interview in Star magazine, Chantelle said: "Getting pregnant was my highlight! I didn't even think it was possible. It's made us stronger."
Alex added: "And getting engaged. I wasn't sure I wanted to go back into a high -profile relationship - but it was fate!"