French Stewart welcomes baby daughter Helene Claire - See the pic
"She was born six weeks early and could be held in the palm of your hand," the 49-year-old tells People.
He adds of her name, "We named her after my lovely mother. My sister is also a Helene. There are five wonderful Claires in Vanessa's family so the tradition of it is very special for us."
Apparently Helene came at just the right time for Stewart, who is working on "Mom" as it heads towards its Sept. 23 premiere on CBS.
"In the daytime I work on a special new show with wonderful people. And at night I have new adventures with Vanessa and Helene," he says. Big congratulations go out to Stewart and his family.