Sarah Chalke attends the premiere of 'Transparent' at Ace Hotel on September 15, 2014 in Los Angeles, California. Credit: Jason LaVeris/FilmMagic

A special arrival for a former TV doctor! Sarah Chalke and fiancé Jamie Afifi have welcomed their second child, Us Weekly exclusively confirms. The pair are also parents of 6-year-old son Charlie.

Chalke, 39, tells Us that she and her entertainment lawyer beau welcomed their daughter, Frankie, two and a half months ago. The couple chose the name as a tribute to the Scrubs star's grandfather.

"I'm madly in love with my kid," Chalke tells Us about her newborn. "It's been really fun."

The actress, who recently appeared on the big screen in (appropriately enough) the comedy Mother's Day, points out that the time has been flying by with her new bundle of joy.

"It's really weird — it's going so fast that the other day, someone asked me [how old Frankie is], and I gave a number that's two weeks younger," she says. "And I'm like, 'Why am I lying about my daughter's age?'"

Chalke voices Beth Smith on Adult Swim's animated comedic sci-fi series Rick and Morty, and she admits that being pregnant while recording her lines for the show's upcoming third season presented a challenge. (Frankie was with her at San Diego Comic-Con on Friday, July 22, where the Roseanne alum was doing press for Rick and Morty.)

"Pregnancy brain — that's a real thing!" she says with a laugh. "That's a real thing, which is the nice thing about doing animation versus live action, is you don't have to memorize your lines — you can just read it. But then it's really embarrassing when you forget your lines, and they're just in front of you."  

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