“Spent the weekend with the family at one of the most fantastic weddings I’ve ever attended. Good times. So much love,” Harris Tweeted on Sunday.
It was all about family for Smulders (who wore a Claire Pettibone gown) and Killam, who are parents to 3-year-old daughter Shaelyn.
True Blood star Joe Manganiello, who plays Marshall’s law school buddy Brad on How I Met Your Mother, also attended the nuptials.
Smulders and Killam announced their engagement in January 2009.