The community organisation uploaded a photo of the famous Staten Island Ferry, photoshopping empty cans on the back of the boat with the words, "Jost Married".
"We're thrilled to break the news that Scarlett Johansson and Colin Jost were married over the weekend in an intimate ceremony with their immediate family and love ones, following COVID-19 safety precautions as directed by the CDC (Centers for Disease Control and Prevention)," the caption read.
"Their wedding wish is to help make a difference for vulnerable older adults during this difficult time by supporting @mealsonwheelsamerica. Please consider donating to celebrate the happy couple by clicking the link in our bio."
Jost proposed to the Marvel actress with a $US400,000 (NZ$600,000) 11-carat engagement ring.
They first met over a decade ago in 2006, but Johansson said her first memory of him is working on an SNL skit together in 2010.
"The only line I remember from the sketch is when Scarlett's bratty character says, 'This party is literally worse than the Holocaust.' That was my Shakespearean sonnet for the woman I would one day fall in love with," Jost recalled, according to E!.
In May 2017, Johansson featured on the SNL finale to play Ivanka Trump, which is when dating rumours began to swirl.
On the Emmys red carpet in September, Jost appeared to confirm his relationship with one of the world's highest-paid actresses.
"She's working, so otherwise, she'd be here," Jost said. "She's pretty cool … It's hard to have a lot of complaints, she's pretty awesome. I'm very happy. I feel very lucky."
They made their relationship red carpet official at the premiere of Avengers: Infinity War in April 2018.
