Backstreet Boys star Kevin Richardson is set to become a dad for the second time.

The singer has taken to to alert fans his wife Kristin is pregnant.

Posting a photo of his visibly-pregnant partner, he writes, "So excited to share... The Easter Bunny brought a very special egg this year."

The couple has a five-year-old son, called Mason.

Richardson's second child will be the sixth born to the members of the Backstreet Boys - Howie Dorough has two kids, Brian Littrell one and A.J. MCLean's firstborn arrived in November (12).