The 38-year-old singer and actress has introduced the delivery of a son, her first baby together with her boyfriend, French singer and songwriter Matt Pokora.
Milian shared the information on his official Instagram account.
"And so let's begin. Isaiah 01/20/20", the caption learn. "Merely excellent. The world is your Son. Love, mother and pop."
Isaiah joins his older sister Violet, 9, from Milian's wedding ceremony to producer-rapper The-Dream.