April 12, 2016 03:00 PM

Sarah Chalke is gearing up for an extra special Mother’s Day: She’s pregnant!

The star is expecting her second child with her fiancé, entertainment lawyer Jamie Afifi, her rep confirms to PEOPLE exclusively.

The actress, best known as Elliot on the long-running comedy Scrubs, is due in the spring.

Chalke, 39, and Afifi are also parents to 6-year-old son Charlie Rhodes.

John Sciulli/Getty

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Chalke is likely prepping her firstborn on how to be a big brother. While Charlie once loved toy diggers more than “anything in the world,” we’ll hedge bets that his new sibling takes over that title.

Chalke will next star opposite Jennifer AnistonJulia Roberts and Kate Hudson in Mother’s Day, out nationwide April 22.

— Lindsay Kimble with reporting by Julie Jordan and Mia McNiece

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