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Linda Cardellini, Steven Rodriguez

Giulio Marcocchi/Sipa Press

Linda Cardellini's latest trip to the hospital was a happy one.

The former ER star and boyfriend Steve Rodriguez welcomed a daughter, their first child together, on Leap Day, Cardellini's rep confirms to E! News.

And is the baby girl's name as special as her once-every-four-years birthday?

No freaky, geeky name for this one!

Lilah-Rose entered the world on Feb. 29, making her parents proud but totally missing the mark if she wanted in on the ever-growing list of weird celebrity baby names.

Cardellini revealed in October that she was expecting.

Congratulations to the new family of three!