By Alicia Brunker
Updated Sep 29, 2018 @ 11:00 am

After a summer of speculation as to when Gwyneth Paltrow and Brad Falchuk would tie the knot, it seems like their wedding weekend is finally underway in the Hamptons.

Earlier this week, Gwyneth was spotted shopping for lingerie at Journelle in New York City, and on Friday evening, the couple hosted their rehearsal dinner at actor Jerry Seinfeld and his wife, Jessica's, East End home — a source reveals to People.

“Oh, I could talk about this for hours!” Jessica said to Us Weekly about the couple in May. “I cannot believe that she found somebody that … I love her so much and I think she’s the most extraordinary person and friend. And then her fiancé is equally that.”

Credit: Emma McIntyre/Getty Images; Jason LaVeris/FilmMagic

She continued: "As a couple it’s never easy to find … you know an equal couple that you love both partners and Jerry and I love both partners equally and together it’s overwhelming.”

Prior to the nighttime festivities, the pair ran some last-minute errands separately, with another insider saying they appeared "very happy."

“They spent most of the day apart,” the source added. “Gwyneth is very involved in the wedding set up, but at the same time seems very chilled. She also seems very excited!”

It is unclear who was at the dinner, but judging from their engagement party's guest list, we're guessing it was pretty star-studded. Back in April, the couple celebrated their love with A-list friends, including Cameron Diaz, Demi Moore, Julia Roberts, and more.

Though she has already been married to ex-husband Chris Martin, this weekend's wedding will be the actress's first, as the former pair eloped in 2003. “I’m excited about everything!” she told PeopleStyle in January. “I’ve never had a wedding before. So even though I’m 45, I sort of feel like a 21-year-old.”