Taran Killam, Cobie Smulders

Jim Spellman/WireImage

Well, that was fast!

How I Met Your Mother alum Cobie Smulders and her Saturday Night Live hubby Taran Killam announced that they were expecting a second child together back in October, and apparently, the actress was further along than anyone may have assumed—because she has already given birth!

Continuing with her under-the-radar trend, Smulders subtly mentioned the little one's arrival (and showed off her post-baby body) while promoting her film Unexpected at the 2015 Sundance Film Festival on Sunday.

"I'm in Sundance and I have a three-week old baby, so I can certainly relate [to the film's theme]," Smulders told Bustle during an interview (so slick!). "It's my world at the moment, and it's just so prevalent in the world today. I'm very lucky where I have a great career and a huge support system and not every woman has that. It's an interesting film because it shows both of those sides."

No other details about their new bundle of joy—like the gender or name—have been revealed.

The longtime lovebirds, who dated for eight years and were engaged for three of those eight, finally tied the knot in 2012 at the Alisal Guest Ranch and Resort in Solvang, Calif. Smulders and Killam are already parents to 5-year-old daughter Shaelyn Cado.

Shortly after welcoming their baby girl, Smulders appeared on The Bonnie Hunt Show, where she opened up about being a first-time mom. "I think I sleep an average of four hours a night now, so it's just like functioning on fumes sometimes," the Captain America: The Winter Soldier star said at the time. "But it's the best."

Aside from parenthood, Smulders has two projects slated for a 2015 release, Avengers: Age of Ultron and Results, while Killam continues to work on comedies Brothers in Law and Casual Encounters.

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