It's a boy for Yahoo CEO Marissa Mayer.
She and her husband welcomed their first child Sunday night.
Mayer was one of the original employees at Google and worked there for 14 years before becoming C-E-O of Yahoo.
She told Fortune magazine in July that she planned to go back to work a few weeks after giving birth.
Her comments set off a lengthy debate about how corporate family leave policies make it hard to juggle a successful career and family.