Gwyneth Paltrow's wedding is underway with massive white tents erected in the star's East Hamptons home on Saturday

By Alexia Fernández
September 29, 2018 04:27 PM

Gwyneth Paltrow‘s wedding to Brad Falchuk is underway!

Large white tents were seen erected over the actress’ Hamptons, N.Y. home on Saturday with crews spotted as they were organizing tables and chairs.

Guests include Cameron Diaz and her husband Benji Madden, and Robert Downey Jr. and his wife Susan, according to sources.

Madden, 39, was photographed making his way from his hotel carrying a suit bag on Saturday. Diaz was later spotted arriving at the venue.

On Friday night, the couple began the festivities with a rehearsal dinner at Jerry Seinfeld and his wife Jessica’s East Hampton, N.Y. mansion, just hours after the two made last minute errands in town.

An aerial view of Gwyneth Paltrow’s home in the Hamptons
| Credit: Splash News

A source told PEOPLE, “Gwyneth and Brad both look very happy.

“They spent most of the day apart,” the insider continued. “Gwyneth is very involved in the wedding set up, but at the same time seems very chilled.”

The source added, “She also seems very excited!”

Benji Madden carrying his suit bag from his hotel in the Hamptons
| Credit: The Image Direct
Crews organizing seats and tables under a white fence at the East Hampton home of Gwyneth Paltrow
| Credit: Splash News

Paltrow and Falchuk had an engagement party in April while in Los Angeles, which was a star-studded gathering with guests including Ryan Murphy (who hosted the bash), Diaz, Demi Moore, Julia Roberts and Kate Hudson.

White tents set up in Paltrow’s Hamptons home
| Credit: Splash News
An aerial view of a white tent at Paltrow’s East Hamptons home
| Credit: Splash News

Sure to be there are Paltrow’s two children with ex-husband Chris Martin: Apple, 14, and Moses, 12.

Paltrow couldn’t contain her excitement when it came to wedding planning when she spoke to PEOPLE in January.

I’m excited about everything!” the actress told PeopleStyle. “I’ve never had a wedding before. [Paltrow and Martin eloped in 2003.] So even though I’m 45, I sort of feel like a 21-year-old.”