Rose Byrne may never have admitted she was pregnant but baby Rocco proves otherwise

DESPITE failing to acknowledge her pregnancy for its entire duration, Rose Byrne has given birth to a son.

Promotional images for the 2016 Sydney Theatre Company season (embargoed until Thursday night, Se

DESPITE failing to acknowledge her pregnancy for its entire duration, Rose Byrne has given birth to a son.

Her long-term partner, fellow actor Bobby Cannavale told The Late Show With Stephen Colbert that their baby boy is named Rocco.

Cannavale may have revealed that they had a baby but Byrne never actually admitted she was pregnant even though it was blatantly obvious when they attended the Museum of Modern Art's 8th Annual Film Benefit Honouring Cate Blanchett in November last year. Picture: Getty Images

The bub was born on February 1. Cannavale reported that Rocco “is doing great”.

It first became apparent that the Bridesmaids star was expecting when she stepped out in November last year heavily pregnant.