Alexis denisof and alyson hannigan start dating
Mac and Sweet Dee definitely don't get along on "Always Sunny," but the actors who play them -- Rob Mc Elhenney and Kaitlin Olson -- have been married since September 2008.
Yes, that means she stuck with him even during the "fat Mac" stage.
Neil Patrick Harris and David Burtka also brought their little ones, Gideon and Harper.
Joe Manganiello, who's appeared on HIMYM in the past and will reprise his role in the upcoming season, also attended the nuptials.
We've rounded up 11 co-star couples who have stood the test of time, so grab a paper and pen, Gwen and Blake, and start taking notes!Cobie Smulders tied the knot with her longterm love, Taran Killam, on Saturday at the Alisal Guest Ranch in Solvang, CA.She wore a gorgeous dress from bridal designer Claire Pettibone.The couple welcomed family and friends to the event, including many of her How I Met Your Mother costars.Alyson Hannigan arrived with her husband, Alexis Denisof, and their kids, Keva and Satyana.