Reflecting on the nuptials on Monday, Haylie, 25, wrote on Twitter: "what a special weekend filled with love and beautiful memories." (The post later disappeared, but not before being reposted by a number of Haylie's fans.)
Hilary, 22, exchanged vows with Canadian hockey player Mike Comrie, 29, in Santa Barbara, Calif., on Saturday. "Mike held his arm around Hilary for most of the romantic, candlelit ceremony, and they both looked extremely happy," an eyewitness told PEOPLE.
Not surprisingly, Haylie served as maid of honor at the ceremony, according to OK! magazine.