Gallagher, 33, is an actor and currently working on a solo album of original material. Hilty, 32, continues to tour the country with her concerts. She also stars on NBC’s Sean Saves The World.
The bride wore a Badgley Mischka dress, and the groom wore J Lindeberg.
“We were so excited to be married that we skipped the engagement altogether!” said Hilty.
The former Smash star and Gallagher met at a fitness class when they were both working on Broadway.
The newlyweds won't have time for a long honeymoon – they're set to perform together at WitZend and the Catalina Jazz Club in Los Angeles on Nov. 21 and 22.