The comedian, 35, shared a photo on Sunday wearing a bridesmaid gown alongside her newlywed friends Tara and Rusty Fitton, and her boyfriend Ben Hanisch.
“Congratulations to @tara_alana and @rustolleum in the best wedding ever,” she captioned the black and white photo. “Very proud to be a bmaid.”
The wedding day was also a special day for Hanisch, who was celebrating his 30th birthday.
“Happy 30th birthday to one of our bestest friends @benhanisch,” the bride posted on Instagram.
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Schumer and Hanisch celebrated their six-month dating anniversary in May.
“Being in love is the scariest thing in the world,” she told Marie Claire last month. “You want to f—— cry and scream. I can’t handle it.”