The 37-year-old actress and Fischer attended the 2018 Tony Awards at Radio City Music Hall in New York.
Schumer wore a sleeveless black dress with a plunging neckline and thigh-high slit up the front. The star was all smiles as she posed for photos with Fischer, whom she married in a secret ceremony in February.
Schumer was nominated for Best Performance by a Leading Actress in a Play for her role as Corky in Meteor Shower, but lost to Three Tall Women star Glenda Jackson.
"Thanks for having us #tonyawards," she wrote on Instagram. "@brandonmaxwell @andrea_tiller @kimmykuppkakes @leesevansstyle thanks for always running my lines with me @mofischhh #prewine."
Schumer and Fischer tied the knot Feb. 13 with Jennifer Lawrence, Jennifer Aniston and other celebrity guests in attendance. The couple were first linked in November following Schumer's split from Ben Hanisch.
"Part of the thing that's good about us getting married so quickly is that we're so in love," the actress said in an interview with the You Up? with Nikki Glaser podcast after her wedding.
"Every girl I know, if they get proposed to they're like, 'Oh, now? Now that I can't have kids?'" she jokingly added.