Zac Hanson, the youngest of the Hanson trio, and his wife Katie are expecting their first child in May. "I am utterly thrilled at the thought of becoming a father," says Zac, 22. "I can't wait to meet this person." Adds Katie, 23, "This is the most amazing time for us. It's the most romantic thing we've ever done." The newest addition to the Hanson family romper room will join Ezra, 5, Penelope, 2, River 1 (middle brother Taylor's children) and Everett, 7 months (eldest brother Isaac's son).