Amanda Seyfried Got Drunk with Her Grandmother atThatLegendary 2007Mamma Mia!Wrap Party (Exclusive)

Mar. 15, 2025

Amanda Seyfried in 2008’s ‘Mamma Mia!'.Photo:Universal Pictures/Relativity Media/Littlestar/Playtone/Kobal/Shutterstock

Universal Pictures/Relativity Media/Littlestar/Playtone/Kobal/Shutterstock

What happens at aMamma Mia!wrap party doesn’t always stay at the wrap party.The 2007Mamma Mia!wrap party became legendary, thanks to leaked photos of the cast having a blast — and rightfully so. “That was 18 years ago, I can’t even do the math,”Amanda Seyfriedrecalls to PEOPLE. “But that wrap party specifically, I was drunk. Everybody was.”It wasn’t just Seyfried, now 39, having a good time at the party; it was a family affair. “My grandmother was at that wrap party and she was slightly drunk,” she says. “She and my mom were there visiting. They always came everywhere I went and she lived until she was 99.”While the cast certainly enjoyed themselves, Seyfried says the wrap parties were a celebration for everyone — not just the actors. “Usually it’s about crew members kind of hooking up,” theMean Girlsactress recalls. “That’s the funny thing about wrap parties.”Despite the hilarious memories, Seyfried admits that her wrap party days are behind her. “Wrap parties are places that I don’t go,” she explains. “I do not venture into the darkness of a wrap party so often.”Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer​​, from celebrity news to compelling human-interest stories.However, there’s one upcoming event that might lure her back. “I might stick around for the wrap party forThe Housemaid,” Seyfried reveals about her new movie, which is set to release on Christmas Day. When asked why she might make an exception, she smiles and adds, “BecauseSyd [Sweeney]loves a party, and I think I would want to celebrate with her.”Sydney Sweeney, Amanda Seyfried.Getty Images for Armani Beauty; WireImageThese days, staying up late looks a lot different for Seyfried. “The last time I stayed up past my bedtime was New Year’s because my daughter and I, with my best friend and her son, went toThe Avett Brothersconcert,” the actress says about her daughterNina, 7, whom she shares with her husbandThomas Sadoski, along with their sonThomas, 4. “They have a New Year’s Eve concert every year, and we were in North Carolina at the concert. So Nina and I stayed up till 1:30 a.m. with my best friend and her 10-year-old son. It was just ridiculous, we were really blurry-eyed.”Though currently away from her kids while filming her upcoming Peacock thriller seriesLong Bright River —premiering March 13 — Seyfried says she finds ways to stay close to them.“I got sent a picture of my kids dressed up … like the Beastie Boys,” the actress tells PEOPLE about her most recent laughing fit. “I couldn’t believe a photo could make me laugh so much. It was perfection.”

What happens at aMamma Mia!wrap party doesn’t always stay at the wrap party.

The 2007Mamma Mia!wrap party became legendary, thanks to leaked photos of the cast having a blast — and rightfully so. “That was 18 years ago, I can’t even do the math,”Amanda Seyfriedrecalls to PEOPLE. “But that wrap party specifically, I was drunk. Everybody was.”

It wasn’t just Seyfried, now 39, having a good time at the party; it was a family affair. “My grandmother was at that wrap party and she was slightly drunk,” she says. “She and my mom were there visiting. They always came everywhere I went and she lived until she was 99.”

While the cast certainly enjoyed themselves, Seyfried says the wrap parties were a celebration for everyone — not just the actors. “Usually it’s about crew members kind of hooking up,” theMean Girlsactress recalls. “That’s the funny thing about wrap parties.”

Despite the hilarious memories, Seyfried admits that her wrap party days are behind her. “Wrap parties are places that I don’t go,” she explains. “I do not venture into the darkness of a wrap party so often.”

Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer​​, from celebrity news to compelling human-interest stories.

However, there’s one upcoming event that might lure her back. “I might stick around for the wrap party forThe Housemaid,” Seyfried reveals about her new movie, which is set to release on Christmas Day. When asked why she might make an exception, she smiles and adds, “BecauseSyd [Sweeney]loves a party, and I think I would want to celebrate with her.”

Sydney Sweeney, Amanda Seyfried.Getty Images for Armani Beauty; WireImage

Getty Images for Armani Beauty; WireImage

These days, staying up late looks a lot different for Seyfried. “The last time I stayed up past my bedtime was New Year’s because my daughter and I, with my best friend and her son, went toThe Avett Brothersconcert,” the actress says about her daughterNina, 7, whom she shares with her husbandThomas Sadoski, along with their sonThomas, 4. “They have a New Year’s Eve concert every year, and we were in North Carolina at the concert. So Nina and I stayed up till 1:30 a.m. with my best friend and her 10-year-old son. It was just ridiculous, we were really blurry-eyed.”

Though currently away from her kids while filming her upcoming Peacock thriller seriesLong Bright River —premiering March 13 — Seyfried says she finds ways to stay close to them.

“I got sent a picture of my kids dressed up … like the Beastie Boys,” the actress tells PEOPLE about her most recent laughing fit. “I couldn’t believe a photo could make me laugh so much. It was perfection.”

source: people.com