It’s a girl for “Supernatural” star Mark Sheppard and his wife Sarah Louise Sheppard, an Australian mining heiress. The couple have announced the birth of their first child together — a daughter — who was born Tuesday (March 1) morning.

RELATED: ‘Supernatural’s’ Mark Sheppard admits Dean is cute, but is he that cute?

“Introducing Isabella Rose Sheppard,” the actor tweets. “7lb 6oz 20in. Born 3/1/16 at 2:35am. Mother and baby doing well.” Prior to the baby’s birth, Sheppard had kept his Twitter followers apprised of the situation, sharing a photo of Sarah checked into the hospital on Monday.

Sarah kept active on Twitter right up until Isabella’s birth as well, letting her followers know the possibility of the little girl being born on leap day (Feb. 29) was a distinct possibility.

The couple first met at a “Supernatural” fan convention before they began dating. They were engaged in August, before announcing they were expecting a child in September. Then, on Nov. 9, they tied the knot.

RELATED: ‘Supernatural’s’ Mark Sheppard on Crowley’s ongoing mommy issues

Isabella Rose is the third child for Sheppard, who has two kids with his former wife Jessica.

Posted by:Chris E. Hayner

Chris E. Hayner is equal parts nerd, crazy person and coffee. He watches too much TV, knows more about pro wrestling than you do and remembers every single show from the TGIF lineup. You may have seen him as a pro-shark protester in "Sharknado 3." His eventual memoir will be called "You're Wrong, Here's Why..." TV words to live by: "I'm a firm believer that sometimes it's right to do the wrong thing."