Like costar Morse, Staton is a veteran of the stage and performed the role of Sky in Mamma Mia over 400 times on Broadway! Although we don’t get to see the Carnegie Mellon alum sing on Mad Men, Staton is great as the amiable and driven Ken Cosgrove. He’s a perfect foil for Kartheiser’s Pete Campbell, but the poor Ken had better watch his back (and his eye) for any future accounts.