Daniel Radcliffe and Jonathan Groff ‘Merry’ off Broadway co-star Lindsay Mendez

Merrily they rolled along … down the aisle.

Lindsay Mendez cast her Broadway co-stars Daniel Radcliffe and Jonathan Groff as ring bearer and officiant, respectively, in her New York City nuptials to fellow actor J. Alex Brinson.

Her 3-year-old daughter, Lucy, from her marriage to Philip Wakefield, also played a major part in the intimate Central Park ceremony: She stood by her mom’s side as the flower girl.

The couple met while starring alongside each other in OWN’s “All Rise” and were engaged on Christmas Day last year. Mendez, 41, and Brinson, 38, tied the knot a month after announcing she is expecting their first child together.

And it’s not just the “Harry Potter” star, 34, and the theater vet, 39, who are supporting her major milestones.

In her Instagram post revealing the pregnancy, Mendez wrote that she is “so grateful for the unrelenting support of my @merrilyonbway producers and company.”

She added: “Together, they have made it so that I can happily work safely, all while growing this true Broadway baby.”

Radcliffe’s and Groff’s involvement in the relationship won’t stop with the wedding either. In early April, Mendez told Seth Meyers, “I keep thinking they’re gonna know Uncle Dan and Uncle Jon’s voices, they’re gonna know a [Stephen] Sondheim score when they come out of the womb. It’s pretty cool.”

The trio’s closeness started in November 2022 when an off-Broadway revival of “Merrily We Roll Along” ran at New York Theatre Workshop. After transferring to Hudson Theatre on Broadway last September, the show was so successful that it was extended.

The final performance is July 7.