Taran Killam and Cobie Smulders have celebrated many milestones together.

The couple married in September 2012 and welcomed their first child, son Shaelyn Cado Killam, in January 2015. They've each had long-running television runs (he in "Saturday Night Live," she in "How I Met Your Mother") – and made memorable turns on the big screen, in "12 Years a Slave" and "The Avengers" series, respectively.

And in 2017, the duo will each make their Broadway debuts.

Killam, 34, is leaping to the big stage in January — as King George III, the two-song comically mad relief of Lin-Manuel Miranda's Tony-winning musical "Hamilton." (Think of him as an angrier version of Killam's recurring "SNL" character, 19th-century newspaper critic Jebidiah Atkinson).

The part was originated on Broadway by Jonathan Groff ("Spring Awakening") and later played by Andrew Rannells ("Falsettos"). Rory O'Malley ("The Book of Mormon"), who is currently in the role, wil plays his last performance on Jan. 15, 2017. Killam steps in Jan. 17.

It is not known for how long Killam's run in "Hamilton" is contracted.

Smulders, 34, will join Kevin Kline in the 16-week limited revival of Noel Coward's "Present Laughter." Performances begin March 10, 2017 at the St. James Theatre ahead of an April 6 opening. Kate Burton (TV's "Scandal") and Kristine Nielson ("Vanya and Sonia and Masha and Spike") also star.

The play, directed by Mortiz von Stuelpnagel, will mark the first time Kline will be back on Broadway in a decade. He'll play a self-obsessed actor in the midst of a mid-life crisis — juggling his talent, ego, and libido.

"I really still can't believe this," Smulders wrote on Twitter. "Cannot wait! What a flipping dream!"

Her husband, meanwhile, already has a head start on his "Hamilton" gig.

The actor, who was let go from the NBC comedy sketch show in September after six seasons, was a special guest at the top of the year for Miranda's popular Ham4Ham lottery. There, Killam performed his own version of "The 12 Days of Christmas" centered around Alexander Hamilton "facts."

"Hamilton" also won't be Killam's first musical in New York. Last summer, he costarred in Encores Off Center production of Little Shop of Horrors alongside with Ellen Greene and "Sunday in the Park with George" star Jake Gyllenhaal.

For tickets and more information about both shows, visit HamiltonBroadway.com and LaughterOnBroadway.com.