May 22, 2014 02:15 PM

Tiffany Rose/Wireimage

She’s here — a little early!

Marshall and Jamie Anne Allman welcomed their third child, a daughter, on Wednesday, May 21, the actress announced on Twitter.

“We are excited about our new addition to the family June Joanne Allman” she Tweeted on Thursday.

The couple’s rep confirms the happy news to PEOPLE, adding that June weighed in at 7 lbs. and measures 20 inches long.

The couple are already parents to 15-month-old twin sons Asher James and Oliver Charles, who were also born early and spent close to three months in the NICU before going home.

Last week, a rep confirmed to PEOPLE that Allman and the True Blood actor were expecting a daughter in June.

We are excited about our new addition to the family June Joanne Allman 5.21.14

— Jamie Anne Allman (@jamieanneallman) May 22, 2014

— Anya Leon

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