The 39-year-old newsreader wrote, "A new chapter begins! Thanks to all for the good wishes on the birth of my beautiful baby girl and thanks to the midwives, doctors, and nurses for the excellent care. Thanks too to the thoughtful @rtenews viewers who have been asking about me and the #newarrival."
Many congratulated the newsreader, among which, Miriam O' Callaghan was first to congratulate Perry on her first child.
Miriam wrote on her social handle, "Congrats to you both – a precious little girl. Enjoy."
Perry and her husband Richard, who married just last year, revealed the name for new bundle-of-joy, which is "Molly."
Previously, it was reported Perry did not want to make it news, as she values her privacy more than anything, however, Caitriona could not hide the joy of being a mom and shared it herself on her Instagram.