Kevin Federline is set to become a father for the fifth time.
While this will be Victoria's first child, Kevin - who has been dating the 28-year-old former professional volleyball player for more than two years - is also dad to Kori, eight, and six-year-old Kaleb, his children with ex-girlfriend Shar Jackson.
A source close to the couple told E! Online: "They are totally happy."
Kevin - who divorced Britney in 2007 after three years of marriage - still officially has the sole custody of the former couple's sons Sean and Jayden, although the youngsters currently split their time between both parents.
With Victoria reportedly being five months pregnant, she can be confident of her partner's parenting skills, as in 2008 he was named Father of the Year by Las Vegas nightclub Prive.
At the time, the magazine explained: "The New Dad, as represented by Kevin and Birkhead, is involved. He trucks the kids to the supermarket, decorates their bedrooms, and even lets them dictate the direction of his career."