Chloe Smith, MP for Norwich North, is expecting her second child in May next year.
Chloe, 36, and husband Sandy, 40, are looking forward to a brother or sister for toddler Alastair, now 2.
Chloe, who is in her tenth year representing Norwich North, says:
"We're really excited and delighted. Alastair will love having a little brother or sister to play with. It'll be hard work but a source of joy."
As with their first child, Chloe and Sandy hope to take six months each of shared parental leave. Chloe will make arrangements for her constituency work to be fully covered.