How I Met Your Mother alum Cobie Smulders is pregnant and expecting her second child with husband Taran Killam Credit: Jim Spellman/WireImage.com

Congrats, Cobie! How I Met Your Mother alum Cobie Smulders is pregnant again, expecting her second child with husband Taran Killam, her rep confirms to Us Weekly.

"They talked about growing their family once she was done with [HIMYM] and moved to New York," a source tells Us of the twosome, who wed in September 2012 in Solvang, Calif.

The new little bundle of joy will join big sister Shaelyn Cado, 5, whom the Avengers: Age of Ultron actress and the Saturday Night Live comedian, both 32, welcomed in May 2009. 

Not long after Shaelyn's birth, Smulders appeared on The Bonnie Hunt Show, where she opened up about first-time motherhood. "I think I sleep an average of four hours a night now, so it's just like functioning on fumes sometimes," the Agents of S.H.I.E.L.D. guest star said at the time. "But it's the best."