Michael J. Fox's Daughter Schuyler Fox Gets Married in New York on Her Mom Tracy Pollan's Birthday! (Exclusive)

Michael J. Fox’s daughter Schuyler is married!

The producer, 29, tied the knot with her longtime partner on Saturday, June 22, which was also her mother Tracy Pollan's 64th birthday in the heart of the Catskill Mountains in New York.

"The weather was absolutely perfect, despite the heat wave," an onlooker tells PEOPLE of the couple's big day, which took place at the luxury wedding venue at Hayfield Catskills. "They dined under a tent, and it really looked like a picture perfect garden party. They seemed like such an adorable, gentle family."

The source adds that Ali Wentworth and George Stephanopoulos, as well as actress Jennifer Grey were spotted in attendance for the nuptials. According to a second source, guests stayed at the Bluebird Hunter Lodge, a cozy, rustic boutique hotel where the bride and groom also hosted pre-wedding events.

Attendees also stayed at the popular Scribner's Catskill Lodge, which has hosted famous guests including Olivia Wilde and Rami Malek, and overlooks Hunter Mountain.

During the celebratory weekend, Fox also paid tribute to his wife of 36 years, Tracy Pollan, on Instagram to mark her 64th birthday on Saturday.

“In every beautiful way, it’s beautiful Tracy’s beautiful day,” the actor captioned his post. “I love you and today will be magnificent. Always forever your Mike with so-much love. Happy birthday. It’s gonna be an epic day.❤️.”

The Back to the Future star and Pollan are also parents to son Sam, 35, and daughters Aquinnah, 29, and Esmé, 22. 

In an interview with PEOPLE in April, Fox hinted at Schuyler’s upcoming nuptials. 

“There's been a lot of challenges. A lot of physical challenges these days have been different bits, but just that I had a lot of stuff… I had a movie, a documentary and a lot of obligations. A lot of things have been a lot of effort [which] has been put into stuff. And so it was, it was a tough year, but a good year, in each of the challenges [that] came up,” he said at the Michael J. Fox Foundation A Country Thing Happened on the Way to Cure Parkinson’s Event. (Fox was diagnosed with Parkinson's in 1991. He revealed his diagnosis in PEOPLE in 1998.)

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“And with the help of family, with the help of people that I work with, I've been able to meet those challenges and go beyond them and do new things," he continued. "And the whole thing is just keep having new experiences, whether it's experiences that push forward, what we're trying to do and our mission with foundation, or whether it's just I'm just, you know, my daughter's getting married too... good things are happening, and life is good. And so it's been a good year, for sure.”