Blanchard's partner shared news of the baby's birth with a photo on Instagram.
Neither parent revealed the baby's name.
CONGRATS LEA! The former "Glee" star welcomed her first child, a baby boy, with her husband Zandy Reich, on Aug. 20.
Wyatt Morgan Cooper is named after Anderson's father who died when he was 10.
"I don't know anything about boys, so I'm so excited," Ashley Graham told Vogue during her pregnancy.
The beauty mogul, reality star, law student and wife of Kanye West took to her social streams to share the first look at their fourth child, born May 9.