Credit: Jeffrey Mayer/

Jessica Capshaw has some happy news to share.

On Tuesday, the Grey's Anatomy actress -- who appears on ABC's primetime hit as Arizona Robbins -- announced via Twitter that she is expecting her third child.

"It is with profound happiness and sheer delight that Christopher Gavigan and I can say that another sweet Gavigan baby is on the way!" she wrote.

Being away from her children -- Luke and Eve -- while she's filming is a struggle for Capshaw, but the busy working mom knows that her kids will no doubt appreciate her juggling act as they get older.

"I love what I do and I think it shows. As my kids get older, they can see me as a mom who loves working," the actress -- who sums up herself as a mom with the words "consistent," "fun" and "patient" -- told Good Housekeeping.

Capshaw, 35, the step-daughter to famed director Steven Spielberg, wed Gavigan, the CEO of nonprofit Healthy Child, Healthy World, in 2004.